Senior members of President Trump’s 2016 campaign are sounding the alarm, warning that Democratic enthusiasm for impeachment and Republican weakness in the suburbs could spell trouble for the president as he embarks on his reelection campaign.

Democrats won back the House majority in 2018, in part due to their success in the suburbs, and those trends held firm in the off-cycle elections on Tuesday.

Democrats took control of both chambers of the legislature in Virginia. The Republican governor of Kentucky appears to have lost in a state Trump carried by 30 points in 2016, though he has yet to concede. And Democrats made gains in the “collar counties” around Philadelphia that will be at the center of the 2020 reelection fight.

In an interview from his home behind the Supreme Court on Capitol Hill, former White House chief strategist Stephen Bannon broke with Republicans who have argued that those elections shouldn’t be viewed as a referendum on Trump.

“Trump has nationalized politics, he’s now popular culture, these are votes on Trump, you have to face that fact,” said Bannon, who has launched an impeachment-focused radio broadcast in defense of Trump called “War Room: Impeachment.”