Top Senate Republican to Campaign With Kari Lake in Arizona

Kari Lake, the former television anchor running for U.S. Senate in Arizona, will campaign on Thursday in Phoenix with a top Senate Republican, the latest sign of the party’s embrace of a candidate whose extreme views made her a lightning rod just two years earlier.

Ms. Lake and Senator John Barrasso of Wyoming, the No. 3-ranking member of Republican leadership, are expected to condemn President Biden for his handling of the migrant crisis, according to an adviser for Ms. Lake’s campaign, on the same day that both the president and Donald J. Trump, his predecessor and likely 2024 opponent, are in Texas visiting the southern border.

Not long ago, Republican leaders in Washington shied away from Ms. Lake, a bombastic ally of Mr. Trump who made echoing his false claims of fraud in the 2020 election a centerpiece of her 2022 campaign for governor, then spent more than a year challenging her own loss to her Democratic rival, Katie Hobbs, in court. She alienated establishment Republicans both in Arizona — with her attacks on the state’s former senator John McCain, who died in 2018 — and in Washington.

But just as Mr. Trump has emerged from a post-presidency nadir to seize a dominant position in the Republican presidential primary, Ms. Lake has begun to be embraced by some members of the Republican establishment as she mounts a bid for the Senate. She has adopted a more conciliatory tone and worked to get back in their good graces, courting the type of Republicans who shied away from her in 2022.

Chuck Coughlin, the chief executive of the Phoenix political consulting firm HighGround, suggested that Mr. Barrasso’s presence could help broaden Ms. Lake’s base of support. “He would be effective at speaking to an audience of Republicans