“I never called President Bush or President Obama,” said Barrasso, who has served in the Senate since 2007. “I just feel comfort in calling President Trump. He calls me regularly to talk about issues. He’s always helpful for both of us.”

Longtime senators who have served through multiple administrations say they have never seen a president so easily accessible to lawmakers. The calls are part of what occupies the wide swaths of “executive time” on Trump’s schedule — an unstructured stretch of the day he uses to call allies and hold meetings that are otherwise not publicly announced.

Senate Majority Leader Mitch McConnell — whom Trump has called while the Kentucky Republican was attending a Nationals baseball game — is among the most frequent of the president’s phone partners. But Trump also speaks often with Sens. David Perdue (R-Ga.), Rand Paul (R-Ky.), Lindsey O. Graham (R-S.C.), Tom Cotton (R-Ark.), Cory Gardner (R-Colo.) and Joni Ernst (R-Iowa), according to people familiar with the conversations…

“I’ve never seen anything like it,” said one GOP senator who occasionally calls Trump, chuckling.