Republican Sen. Jeff Flake said Tuesday he would not seek re-election next year, delivering a forceful condemnation of the “flagrant disregard of truth and decency” and bemoaning political complicity in a Senate speech clearly directed at President Donald Trump.

Speaking to a rapt audience of other senators, the first-term Arizona lawmaker spelled out his frustration and disappointment in a floor speech before relaying the news that he would not be on the ballot in 2018.

“There are times we must risk our careers,” Flake said. “Now is such a time.”

Flake, who has criticized the path that the Republican Party has taken under Trump, said the impulse “to threaten and scapegoat” could turn America and the GOP into a “fearful, backward-looking people” and a “fearful, backward-looking party.” Flake didn’t mention Trump by name, but clearly was directing his remarks at the president and his administration.

Flake, a former House member, is a conservative who favors limited government and free markets but one known to work on bipartisan legislation. Most notably, he has worked on immigration legislation aimed at finding a path to citizenship for the 11 million immigrants living here illegally.