Former President Donald Trump has selected Ohio Sen. J.D. Vance as his vice presidential running mate.

“After lengthy deliberation and thought, and considering the tremendous talents of many others, I have decided that the person best suited to assume the position of Vice President of the United States is Senator J.D. Vance of the Great State of Ohio,” Trump wrote July 15 on Truth Social.

Vance, 39, won his Senate seat in 2022 with Trump’s backing. He would be one of the youngest vice presidents in U.S. history.

But before becoming one of Trump’s fiercest allies and defenders, Vance sharply criticized the former president. During the 2016 presidential election, Vance wrote  that he goes “back and forth between thinking Trump is a cynical a–hole like Nixon who wouldn’t be that bad (and might even prove useful) or that he’s America’s Hitler.”

He has since sounded a different tone including in defending Trump’s actions in the events leading up to and during the Jan. 6, 2021 attack on the U.S. Capitol. Vance was critical of Vice President Mike Pence’s handling of the 2020 election results certification and in an interview with Kaitlan Collins on CNN questioned whether the vice president’s life was actually endangered during the riots. Vance also vocally condemned what he sees as the tenor of political rhetoric, which he tied to an assassination attempt during Trump’s July 13 rally in Butler, Pennsylvania.

“The central premise of the Biden campaign is that President Donald Trump is an authoritarian fascist who must be stopped at all costs,” Vance posted on X shortly after the shooting. “That rhetoric led directly to President Trump’s attempted assassination.”

Who is J.D. Vance and what is his relationship with Trump?

Before winning his Senate seat in 2022, Vance worked as an investor, commentator and bestselling author.

Vance, who was born in Middleton, Ohio, served in the U.S. Marine Corps before attending Ohio State University and Yale Law School. He worked as a corporate lawyer before moving into the tech industry as a venture capitalist.

Vance rose to fame through his 2016 memoir “Hillbilly Elegy,” which describes his growing up in poverty and details the isolation, violence and drug addiction that often surrounds poor white communities in middle America.

When the book was released, Vance started talking to the media about issues important to people in his community — and started criticizing Trump.

Vance told ABC News in August 2016 that, although Trump successfully “diagnoses the problems” people are facing, he didn’t see Trump “offering many solutions.” In an October 2016 interview with journalist Charlie Rose, Vance said he was a “never-Trump guy.”

In another 2016 interview about his book, Vance told a reporter that, although his background would have made him a natural Trump supporter, “the reason, ultimately, that I am not … is because I think that (Trump) is the most-raw expression of a massive finger pointed at other people.”

Vance began to publicly change course when he launched his Senate campaign in 2021. He deleted tweets from 2016 that included him calling Trump “reprehensible” and an “idiot.” In another deleted tweet following the release of the “Access Hollywood” tape on which Trump said fame enabled him to grope women, Vance wrote: “Fellow Christians, everyone is watching us when we apologize for this man. Lord help us.”

He apologized about his Trump criticisms in a July 2021 Fox News interview, and asked people not to judge him based on what he had said. “I’ve been very open that I did say those critical things and I regret them, and I regret being wrong about the guy,” Vance said. “I think he was a good president, I think he made a lot of good decisions for people, and I think he took a lot of flak.”

In June, after news circulated that Vance was on Trump’s short list for vice president, Fox News host Bret Baier asked Vance about the comments. Vance said he was wrong about Trump. “He was a great president, and it’s one of the reasons why I’m working so hard to make sure he gets a second term,” he said.

Trump endorsed Vance in the Ohio GOP Senate primary, helping him win the race and the general election.

As a senator, Vance lobbied to defeat Ohio’s constitutional amendment that ensured access to abortion, calling it a “gut punch” after the measure passed.

After the hazardous East Palestine, Ohio, train derailment in 2023, which ignited a fire and led to evacuations and a controlled release of chemicals, Vance worked with Ohio’s senior senator, Democrat Sherrod Brown, to introduce rail safety legislation.

How Vance fares on the Truth-O-Meter

PolitiFact has fact-checked Vance 10 times. He’s received two Pants on Fire ratings, three Falses, two Mostly Falses and two Half Trues. He also received one Mostly True rating before he was a politician in 2018.

In March, Vance echoed a popular Republican talking point, saying that “100% of net job creation under the Biden administration has gone to the foreign-born.” We rated that Mostly False. Since Biden took office in early 2021, the number of foreign-born Americans who are employed has risen by about 5.6 million. But over the same time period, the number of native-born Americans employed has increased by almost 7.4 million.

We rated False Vance’s claim in February that the $95 million Ukraine supplemental aid package included a “hidden impeachment clause against President Trump.” The measure doesn’t mention impeachment.

Because it’s the president’s job to spend congressionally appropriated funds, experts said whoever is elected president next will be responsible for spending the money allocated in the law. It doesn’t target former Trump; it would apply the same way to Biden, should he be reelected.

On immigration, Vance falsely claimed in 2022 that Biden’s “open border” meant that “more Democrat voters were “pouring into this country.” Immigrants who cross the border illegally cannot vote in federal elections. The process for immigrants to become citizens and therefore gain the right to vote can take a decade or longer.

PolitiFact also addressed controversial comments Vance made in 2021, surfaced during his Senate run, about rape being “inconvenient.”

Vance didn’t directly say “rape is inconvenient.” But when he was asked in an interview whether laws should allow people to get abortions if they were victims of rape or incest, he said that society shouldn’t view a pregnancy or birth resulting from rape or incest as “inconvenient.”

In the interview, which occurred before the U.S. Supreme Court overturned Roe v. Wade in 2022, Vance was also asked whether anti-abortion laws should include rape and incest exceptions. “Two wrongs don’t make a right,” he said in response. “At the end of day, we are talking about an unborn baby. What kind of society do we want to have? A society that looks at unborn babies as inconveniences to be discarded?”

​When asked again about the exceptions, Vance said: “The question portrays a certain presumption that is wrong. It’s not whether a woman should be forced to bring a child to term, it’s whether a child should be allowed to live, even though the circumstances of that child’s birth are somehow inconvenient or a problem to the society.”

Since being on Trump’s vice presidential short list, Vance has expressed a more moderate view on abortion.

On July 7 on NBC’s “Meet the Press,” for example, Vance said he supports access to the abortion pill mifepristone after the Supreme Court dismissed the case against it — echoing what Trump said days before during the presidential debate.

This fact check was originally published by PolitiFact, which is part of the Poynter Institute. See the sources for this fact check here.