Christopher Collins, an upstate New York politician and the first member of Congress to endorse Donald Trump, has been indicted on insider trading charges.

Collins, a Republican from the Buffalo area who is up for re-election this fall, was charged with conspiracy, wire fraud and other offenses in an indictment announced on Wednesday.

Collins’ seat was considered vulnerable even before the charges were announced, and he was targeted in a push by Andrew Cuomo, the governor, and other New York Democrats seeking to unseat him as the party looks to take control of the House of Representatives in November’s midterm elections.

The congressman’s son, Cameron, and Stephen Zarsky, the father of Cameron’s fiancee, were also charged in the scheme.

Prosecutors say that Collins improperly traded on inside information from the Australian drug company Innate Immunotherapeutics Limited, on whose board he served.

The firm’s stock plunged by more than 92% after it was revealed that a multiple sclerosis drug it was developing had failed trials.

Collins found out about the failed drug trial before it became public – getting an email about the results while attending the congressional picnic at the White House last year, the indictment alleges.

He quickly called his son to tip him off, federal prosecutors from the southern district of New York said. Cameron Collins in turn allegedly tipped off Zarsky and others.

The group avoided $768,000 in losses by selling off stock early because of the illicit tip, prosecutors say.

Collins was already under investigation at the time by the Office of Congressional Ethics for his dealing with Innate, and did not sell off his own stock in the company, according to the indictment.

“We will answer the charges filed against Congressman Collins in court and will mount a vigorous defense to clear his good name,” his attorneys, Jonathan Barr and Jonathan New, said in a statement, according to the Associated Press.

“It is notable that even the government does not allege that Congressman Collins traded a single share of Innate Therapeutics stock. We are confident he will be completely vindicated and exonerated.”

Collins, who was first elected in 2012, threw his support behind Trump in February 2016, becoming the first Congressional Republican to endorse the future president.