Collins was the first congressman to support Trump; Hunter was the second
The First 2 Congressmen To Endorse Trump Have Been Indicted
https://www.huffingtonpost.com/entry/trump-duncan-hunter-chris-collins-indictments_us_5b7caf60e4b07295150dd6cb
The first two members of Congress to publicly support Donald Trump for president have been indicted, and the three men who were next in line to back him have weathered significant scandals.
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Jeff Sessions gave a significant boost of establishment credibility to Trumps campaign when, as a U.S. senator from Alabama, he endorsed him in the GOP primary. Sessions, who is now attorney general, had to recuse himself from special counsel Robert Muellers investigation into Russian interference in the 2016 election after questions emerged about his interactions with Russian officials during the Trump presidential campaign.
Reps. Scott DesJarlais (R-Tenn.) and Tom Marino (R-Pa.) were the fourth and fifth members of Congress to publicly back Trump. HuffPost broke the story in 2012 that, although DesJarlais, a physician, presented himself as anti-abortion and pro-family, he pressured his mistress ― who was also his patient ― to get an abortion.
In 2017, Marino withdrew from consideration as Trumps drug czar after an investigation found that he sponsored legislation that made it harder for the Drug Enforcement Agency to battle the opioid epidemic.