U.S. President Donald Trump will sign an executive order on Tuesday making official his vow to double tariffs on steel and aluminum, White House spokeswoman Karoline Leavitt told reporters in a briefing.

A potential trade deal between the world’s top two economies hinges on Donald Trump and Xi Jinping overcoming core differences in their negotiation styles, former acting White House Chief of Staff Mick Mulvaney said.

Yet a new report from Catalist, a left-leaning political-data firm, shows that although Democrats still won a majority of young voters, their long-standing advantage over the Republican Party was reduced by nearly two-thirds.