LAS VEGAS — President Biden and former president Barack Obama, speaking at former Senate Majority Leader Harry M. Reid’s memorial service Saturday, lavished praise on Reid’s pragmatic, dealmaking style, at times suggesting a pointed contrast with today’s all-or-nothing politics.

“At a time when so many Americans apply strict purity tests to politicians … Harry had a different view,” Obama said. “He didn’t believe in highfalutin’ theories or rigid ideologies.”