Former Vice President and current Democratic frontrunner, Joe Bidden says that, even if subpoenaed, he will not testify in the impeachment trial of President Donald J. Trump.

Biden said the idea for a “witness swap” in the impeachment trial is off the table. When asked by voters Wednesday if he would consider testifying in exchange for the testimony of other Trump officials, Biden dismissed the idea.

He stated his reasoning for denying testimony is based on the fact that the impeachment trial is “a constitutional issue.” The Democrat said he wants no part of what could be turned into a “political theater.”

“The reason why I would not make the deal, the bottom line is, this is a constitutional issue. And we’re not going to turn it into a farce, into some kind of political theater,” the former vice president told a crowd at a campaign event in Iowa on Wednesday, “They’re trying to do that. I want no part of that.”

The former vice president went on to defend the actions of his son Hunter by saying that other than an appearance of poor judgment, he did nothing “inappropriate,” or “wrong,” in Ukraine.

Other Democrats, including Senate Minority Leader Chuck Schumer and House impeachment manager Adam Schiff, have also ruled out the possibility of “a swap,” after pushing for witnesses to testify in the Senate trial.

“This isn’t a fantasy football trade,” Schiff told reporters Wednesday. “This isn’t, ‘We will offer you this, if you give us that’ or offer a witness irrelevant and immaterial with no relevant testimony but a witness that allows us to smear a presidential candidate if you give us a witness. That’s not a trade. Trials aren’t trades for witnesses.”