Rep. Raja Krishnamoorthi, an Illinois Democrat, proposed a plan Monday to cap nicotine levels in e-cigarettes, a new and aggressive strategy for countering a rise in teen vaping that officials consider an epidemic.

“We can and must regulate nicotine levels in potent e-cigarette devices to make vaping less addictive and less appealing to youth,” Krishnamoorthi said at the City Club of Chicago. “We just have to do it. There’s no other choice.”