Donald Trump is facing a sharp backlash from young voters, with new polling showing his approval rating among Generation Z has dropped to one of its lowest points yet.

The latest YouGov/Yahoo poll, conducted between June 26-30 among 1,597 adults, shows that among Gen Z voters, his net rating has deteriorated sharply, falling from -23 points in May to -41 points in June.

Net ratings do have a tendency to swing much more than a simple approval rating. Still, the president’s approval rating in June is low, at 27 percent. The margin of error is at plus or minus 3.2 percent.

Lucas Walsh, a youth political behavior expert and professor at Monash University, told Newsweek that Trump’s falling support among Gen Z voters may reflect how young people “respond to issues rather than party allegiances.”