Brendan Bordelon reports for National Review Online that Republican presidential candidate Donald Trump and Democratic counterpart Bernie Sanders are targeting some of the same voters.

After hitting his ceiling in a primary dominated by Hillary Clinton, Bernie Sanders is targeting an unexpected demographic in an effort to expand his base: Donald Trump’s blue-collar supporters.

On Monday night, Sanders and Trump traded barbs at their respective campaign rallies as a low-scale war between the two intensified. Calling Sanders a “wacko,” Trump told a crowd in New Hampshire that the Vermont senator’s election would entail “massive, massive tax increases,” because he “wants to give everything away for free.” Sanders hit back after a rally in Las Vegas. “Being called wacko by a pathological liar like Mr. Trump makes me think he is getting nervous that the American people are catching on to his pathetic policies,” he said through a spokesperson.

The attack struck a nerve with Trump, temporarily drawing the real-estate mogul’s attention away from his GOP challengers and toward a self-described socialist who is considered a long shot to win his party’s nomination, much less the White House. “Bernie Sanders, who blew his campaign when he gave Hillary a pass on her e-mail crime, said that I feel wages in America are too high. Lie!” Trump tweeted on Sunday. He continued the Twitter assault through Monday, even while he agreed that “wages in are [sic] country are too low” and adopted Sanders’s lament for a squeezed middle class.

The contretemps is unlikely to have a decisive impact on either man’s poll numbers, and it appears to be something of a Hail Mary pass for Sanders, who is stuck in a daunting 25-point polling hole as Clinton continues to consolidate support. But it shows the extent to which both candidates have based their campaigns on an appeal to working-class voters angry that elites in both parties have forgotten about them — and the extent to which such voters represent the point where the far Right and far Left converge. Though Trump and Sanders have drastically different personalities, on important blue-collar issues such as international trade, their messages are more similar than you’d think, as are their supporters.