Donald Trump Posts Graph Showing J.D. Vance's Ohio Success Was Due to Him

Former President Donald Trump says polling data shows his support for J.D. Vance propelled the Senate candidate to victory in this week's Ohio Republican primary.

Trump spokeswoman Liz Harrington on Wednesday tweeted a graph showing Vance rising in polls after the former president endorsed him and getting another boost after the two campaigned together at a rally. The tweet is the latest boast from Trump's camp of his continued dominance of the Republican Party following Tuesday's closely watched primary.

Harrington's tweet included a screenshot of Real Clear Politics' poll average for the Ohio Republican primary for Senate. The image shows Vance at around 10 percent in the polls before Trump, on April 15, gave his coveted endorsement to the venture capitalist and author.

The screenshot shows Vance shooting up to nearly 15 percent the day of the endorsement and to 17 percent days later, but still behind then-frontrunner Josh Mandel's 24 percent.

Trump held a rally for Vance on Saturday, April 23. A day later, Vance was tied with former state treasurer Mandel at 23 percent, according to a poll average from Real Clear Politics. Vance pulled ahead of Mandel in the polls leading up to Tuesday's primary. As of Wednesday, Vance currently has 32.2 percent of ballots cast to Mandel's 23.9 percent with 95 percent of the vote counted.

"The GOP is now the MAGA party!" Donald Trump Jr. proclaimed in a tweet Tuesday, using the shorthand for his father's slogan "Make America Great Again."

 J.D. Vance Shakes Hands With Donald Trump
Former President Donald Trump has taken credit for J.D. Vance's win in the Ohio Republican Senate primary this week, citing his recent endorsement as the reason in a press release. Above, Vance shakes hands with Trump during a rally at the Delaware County Fairgrounds in Delaware, Ohio, on April 23, 2022. Getty Images/Drew Angerer

House candidates endorsed by Trump also prevailed in their primary races on Tuesday.

David Niven, a political science professor at the University of Cincinnati, told Newsweek in an earlier story that the primary results signals that Ohio Republicans are receptive to confrontational candidates in the mold of Trump, rather than the more staid Rob Portman, who is retiring from representing the state in the Senate.

"Trump's endorsement elevated J.D. Vance to the head of the pack," said Niven. "But even with Trump's endorsement, the vast majority of Ohio Republicans voted for someone else."

Notably, the Real Clear Politics poll average shows state Senator Matt Dolan, a GOP candidate who did not seek Trump's endorsement, experiencing a smaller surge that tracked Vance's. Dolan came in third with 23.3 percent and has since endorsed Vance.

"Ohio Republicans have spoken and now it's time to look forward, united in our conservative convictions to make our state and nation a better place to live, work, and raise a family," Dolan said in a statement Tuesday.

Previously, Trump disparaged polls in the run-up to the 2020 presidential election, insisting he was ahead of Democrat Joe Biden and calling some poll results "fake."

Newsweek has reached out to Trump for comment.