As former President Donald Trump prepares for a momentous court appearance Tuesday on charges related to the hoarding of top-secret documents, Republican allies are amplifying, without evidence, claims that he is the target of a political prosecution. To press their case, Trump's backers are citing the Justice Department's decision in 2016 not to bring charges against former Secretary of State Hillary Clinton, his Democratic opponent in that year's presidential race, over her handling of classified information. His supporters also are invoking a separate classified documents investigation concerning President Joe Biden to allege a two-tier system of justice that is punishing Trump, the undisputed early front-runner for the GOP's 2024 White House nomination, for conduct that Democrats have engaged in. "Is there a different standard for a Democratic secretary of state versus a former Republican president?” said Florida Gov. Ron DeSantis, a Trump primary rival. “I think there needs to be one standard of justice in this country.” But those arguments overlook abundant factual and legal differences — chiefly relating to intent, state of mind and deliberate acts of obstruction — that limit the value of any such comparisons. A look at the Clinton, Biden and Trump investigations and what separates them: WHAT DID CLINTON DO? Clinton relied on a private email system for the sake of convenience during her time as the Obama administration's top diplomat. That decision came back to haunt her when, in 2015, the intelligence agencies' internal watchdog alerted the FBI to the presence of potentially hundreds of emails containing classified information. FBI investigators would ultimately conclude that Clinton sent and received emails containing classified information on that unclassified system, including information classified at the top-secret level. Of the roughly 30,000 emails turned over by Clinton's representatives, the FBI has said, 110 emails in 52 email chains were found to have classified information, including some at the top-secret level. After a roughly yearlong inquiry, the FBI closed out the investigation in July 2016, finding that Clinton did not intend to break the law. The bureau reopened the inquiry months later, 11 days before the presidential election, after discovering a new batch of emails. After reviewing those communications, the FBI again opted against recommending charges. WHAT IS TRUMP ACCUSED OF DOING? The indictment filed by Justice Department special counsel Jack Smith alleges that when Trump left the White House after his term ended in January 2021, he took hundreds of classified documents with him to his Florida estate, Mar-a-Lago — and then repeatedly impeded efforts by the government he once oversaw to get the records back. The material that Trump retained, prosecutors say, related to American nuclear programs, weapons and defense capabilities of the United States and foreign countries and potential vulnerabilities to an attack — information that, if exposed, could jeopardize the safety of the military and human sources. Beyond just the hoarding of documents — in locations including a bathroom, ballroom, shower and his bedroom — the Justice Department says Trump showed highly sensitive material to visitors who without security clearances and obstructed the FBI by, among other things, directing a personal aide who was charged alongside him to move boxes around Mar-a-Lago to conceal them from investigators. Though Trump and his allies have claimed he could do with the documents as he pleased under the Presidential Records Act, the indictment makes short shrift of that argument and does not once reference that statute. All told, the indictment includes 37 felony counts against Trump, most under an Espionage Act pertaining to the willful retention of national defense information. WHAT SEPARATES THE CLINTON AND TRUMP CASES? A lot, but two important differences are in willfulness and obstruction. In an otherwise harshly critical assessment in which he condemned Clinton's email practices as “extremely careless,” then-FBI Director James Comey announced that investigators had found no clear evidence that Clinton or her aides had intended to break laws governing classified information. As a result, he said, “no reasonable prosecutor" would move forward with a case. The relevant Espionage Act cases brought by the Justice Department over the past century, Comey said, all involved factors including efforts to obstruct justice, willful mishandling of classified documents and the exposure of vast quantities of records. None of those factors existed in the Clinton investigation, he said. That is in direct contrast to the allegations against Trump, who prosecutors say was involved in the packing of boxes to go to Mar-a-Lago and then actively took steps to conceal the classified documents from investigators. The indictment accuses him, for instance, of suggesting that a lawyer hide documents demanded by a Justice Department subpoena or falsely represent that all requested records had been turned over, even though more than 100 remained. The indictment repeatedly cites Trump's own words against him to make the case that he understood what he was doing and what the law did and did not permit him to do. It describes a July 2021 meeting at his golf club in Bedminster, New Jersey, which he showed off a Pentagon “plan of attack” to people without the security clearances to view the material and proclaimed that “as president, I could have declassified it.” “Now I can’t, you know, but this is still a secret,” the indictment quotes him as saying. That conversation, captured by an audio recording, is likely to be a powerful piece of evidence to the extent that it undercuts Trump's oft-repeated claims that he had declassified the documents he brought with him to Mar-a-Lago. WHERE DOES BIDEN FIT IN? The White House disclosed in January that, two months earlier, a lawyer for Biden had located what it said was a “small number” of classified documents from his time as vice president during a search of the Washington office space of Biden's former institute. The documents were turned over to the Justice Department. Lawyers for Biden subsequently located an additional batch of classified documents at Biden's home in Wilmington, Delaware, and the FBI found even more during a voluntary search of the property. The revelations were a humbling setback for Biden's efforts to draw a clear contrast between his handling of sensitive information and Trump's. Even so, as with Clinton, there are significant differences in the matters. Though Attorney General Merrick Garland in January named a second special counsel to investigate the Biden documents, no charges have been brought and, so far at least, no evidence has emerged to suggest that anyone intentionally moved classified documents or tried to impede the probe. While the FBI obtained a search warrant last August to recover additional classified documents, each of the Biden searches has been done voluntarily with his team's consent. The Justice Department, meanwhile, notified Trump's vice president, Mike Pence, earlier this month that it would not bring charges after the discovery of classified documents in his Indiana home. That case also involved no allegations of willful retention or obstruction. _____ Follow Eric Tucker on Twitter at http://www.twitter.com/etuckerAP ___ More on Donald Trump-related investigations: https://apnews.com/hub/donald-trump Read More Ivanka and Jared split over attending Trump 2024 launch – follow live Why was Donald Trump impeached twice during his first term? Four big lies Trump told during his 2024 presidential announcement Jim Jordan rejects Trump statement suggesting Mar-a-Lago papers weren’t declassified Kimberly Guilfoyle posts chilling warning over Trump indictment Trump-appointed judge will stay on Mar-a-Lago documents case unless she recuses