In a text message to supporters, the presumptive Democratic nominee said, “I’m thrilled to tell you this first: I’ve chosen Sen. Tim Kaine as my running mate.”

On Twitter a few seconds later, Clinton described Kaine as “a man who’s devoted his life to fighting for others.”

Kaine himself tweeted, “I’m honored to be her running mate.” The two will make their first appearance together Saturday at a rally in Miami.

With the pick, Clinton moved into the political spotlight a day after newly crowned Republican nominee Donald Trump closed out his convention with a fiery address accusing his general election opponent of “terrible, terrible crimes.”

Kaine, 58, had long been a favorite for Clinton’s ticket. Fluent in Spanish and active in the Senate on foreign relations and military affairs, he built a reputation for working across the aisle as Virginia’s governor and as mayor of Richmond.

Clinton’s decision caps a highly secretive, months-long process to find a political partner. Clinton called Kaine by phone around 7:30 p.m. Friday to offer him the job, and he accepted, according to a campaign aide. She then called President Barack Obama to inform him of the decision.

Clinton was weighing two finalists: Kaine and Agriculture Secretary Tom Vilsack, a longtime friend of the candidate and former President Bill Clinton. Kaine’s strong ties to Virginia, a crucial general election battleground, and his foreign policy experience put him over the top, according to a person close to the campaign, who insisted on anonymity because the person was not authorized to discuss the process publicly.

Kaine has been a favorite of Obama since his early 2008 endorsement, the president told Clinton’s campaign he believed the senator would be a strong choice during the selection process.

Those views are not shared by some liberals in the Democratic Party, who dislike his support of free trade and Wall Street. They pushed Clinton to pick Massachusetts Sen. Elizabeth Warren or Ohio Sen. Sherrod Brown, intensifying their criticism of Kaine late this week as his selection appeared imminent.

Stephanie Taylor, co-founder of the Progressive Change Campaign Committee, said Friday that Kaine’s support for the Trans-Pacific Partnership trade pact gives Republicans “a new opening to attack Democrats on this economic populist issue.”

Clinton’s campaign largely declined to comment on the search process, trying to keep the details — even the names of the finalists — under wraps to try to maximize the impact of their announcement. She made no mention of her impending pick during a somber meeting Friday with community leaders and family members affected by the Pulse nightclub shooting in Orlando and a later campaign rally in Tampa.

As Clinton prepared to make her VP pick Friday, Trump met with supporters at his convention hotel in Cleveland to run through a long list of thank-yous after the end of his four-day coronation as head of the Republican Party.

But rather than stay focused on Clinton or reach out to the general election voters he now must court, the newly minted Republican nominee spent considerable time stoking the fire of his bitter quarrel with Republican former rival Ted Cruz. “Ted, stay home,” Trump said, dismissing any interest in an endorsement the Texas senator refuses to provide. “Relax. Enjoy yourself.”

Trump boasted of his TV ratings, his primary victories and other achievements, including winning over his wife, Melania, in a stream-of-consciousness delivery with his vice presidential nominee, Indiana Gov. Mike Pence, standing quietly nearby.

“I don’t do anything unless I win,” Trump insisted. He promised to work “so hard” as the nominee and vowed his campaign was “not going to disappear,” even though he has no plans to campaign this weekend and no events on his schedule for next week.

No matter, perhaps, as that time will belong to Clinton and the Democrats, whose own convention begins Monday in Philadelphia. Kaine, who won election to the Senate in 2012 after serving as Obama’s first chairman of the Democratic National Committee, will likely speak in the slot reserved for the vice presidential pick on Wednesday night.