This post has been updated with Romney’s statement that he will vote for the subpoena because Homeland Security and Governmental Affairs Committee Chairman Ron Johnson (R-Wis.) has said the situation will be handled behind closed doors.

Mitt Romney became persona non grata in certain parts of the conservative movement last month by becoming the first senator of a president’s own party to ever vote to remove him from office.

Now, he’s in line to throw more wrenches in President Trump’s and the GOP’s efforts to dig up dirt on former vice president Joe Biden and his son Hunter — this time with more practical impact.

Romney indicated Thursday that he is skeptical about the need for the Senate Homeland Security and Governmental Affairs Committee to issue a subpoena related to Hunter Biden’s work for Burisma Holdings, the Ukrainian energy company.

“I would prefer that investigations are done by an independent, nonpolitical body,” Romney told The Washington Post’s Mike DeBonis. “There’s no question the appearance is not good.”

Romney also told reporters the effort “appears political” and said, “I think people are tired of these kind of political investigations.”

By Friday, Romney’s office said he would vote for the subpoena after gaining assurances from committee chairman Ron Johnson (R-Wis.).

“Sen. Romney has expressed his concerns to Chairman Johnson, who has confirmed that any interview of the witness would occur in a closed setting without a hearing or public spectacle,” Romney spokeswoman Liz Johnson said. “He will therefore vote to let the chairman proceed to obtain the documents that have been offered.”

While Romney’s vote to remove Trump was essentially a symbolic one, that won’t be the case on the committee. Republicans have an 8-6 majority, meaning Romney’s vote, when combined with the six Democrats on the committee, would deadlock it at 7-7 and prevent the subpoena from being issued.

Johnson has set the subpoena vote for Wednesday. The subpoena seeks documents from Blue Star, a Democratic public affairs firm, about Hunter Biden’s role on the Burisma board. It is now likely to be approved, though GOP Sen. Rob Portman of Ohio hasn’t committed to voting for it yet.

There has been no evidence produced that Biden did anything illegal, even as it’s generally acknowledged that he was profiting off his father’s time as vice president. Trump’s initial conspiracy theory about the situation involved the idea that Joe Biden did something corrupt by forcing out a Ukrainian prosecutor who had at one point investigated Burisma. But there are myriad logical flaws in that argument, and during impeachment proceedings Trump’s legal team largely shelved it and instead focused on the idea that Hunter Biden had done something wrong.

Johnson indicated he’d pursue the subpoena in letters sent last week and then on Sunday, one day after Joe Biden revitalized his campaign with a win in the South Carolina primary. Biden then followed that up with stream of wins on Super Tuesday that put him at the top of the race to become the Democratic nominee.

Trump seems to suddenly have rekindled his interest in Hunter Biden and Burisma. After he and his party went weeks following his impeachment without invoking the issue much, the president on Wednesday night told Fox News that Hunter Biden and Burisma would be a fixture of a potential matchup with Joe Biden in the general election.

Trump noted that Democrats hadn’t used the issue against Biden and said that “wouldn’t happen with the Republicans, I can tell you.”

“That will be a major issue in the campaign,” Trump said. “I will bring that up all the time, because I don’t see any way out for them. I don’t see how they can answer those questions. I hope they can. I’d actually prefer it that they can’t.”

Romney has previously signaled a reluctance to have the Senate investigate Hunter Biden. When he voted to remove Trump, he indicated he saw it as little more than a political effort.

“With regards to Hunter Biden, taking excessive advantage of his father’s name is unsavory but also not a crime,” Romney said. “Given that in neither the case of the father nor the son was any evidence presented by the president’s counsel that a crime had been committed, the president’s insistence that they be investigated by the Ukrainians is hard to explain other than as a political pursuit. There is no question in my mind that were their names not Biden, the president would never have done what he did.”

President Trump attacked House Speaker Nancy Pelosi (D-Calif.) and Sen. Romney (R-Utah) Feb. 6 for justifying their impeachment actions on religious grounds. (The Washington Post)

Romney’s continued reluctance — whatever form it eventually takes — comes after he faced withering attacks from conservatives and from Trump. He was banned from the Conservative Political Action Conference and saw conspiracy theorists try to tie him to Burisma through a former political adviser. Trump himself promoted those attacks and lodged some of his own, including calling Romney a “disgrace,” a “lowlife” and a “grandstander.” He even criticized Romney for invoking his faith in making his decision on impeachment.

Trump has had great success in keeping the GOP troops in line, but not so much with Romney. Even though polling showed a strong majority of Utahns opposed Trump’s impeachment, reactions to Romney’s vote were more positive than negative. The same poll showed 60 percent of Utah Republicans disapproved of the decision, but that’s far less blowback than we’ve seen with other Republicans who have earned Trump’s very public ire.

The flip side of going to war with Romney, of course, is that it might not work. And in a closely divided Senate, sometimes you need that vote. And to the extent Romney seeks to delegitimize and downplay the Hunter Biden attacks, that’s an arrow in the Democrats’ quiver too.