WASHINGTON (AP) — President Donald Trump, emboldened by Republican election wins in the Senate and scornful of GOP candidates he felt didn’t sufficiently embrace his support, delivered a stark warning to the new Democratic House majority on Wednesday: Investigate me, and I’ll investigate you — and the government will grind to a halt.

Noting that his Republican Party retained control of the Senate on Tuesday, he said that if Democrats in the House come after him, “we’ve got” a thing called the U.S. Senate.

Speaking at a wide-ranging White House press conference, Trump, by turns combative and conciliatory, said Democrats and Republicans should set aside partisanship to work together.

Some House Democrats have threatened to use the subpoena power they will gain in January to investigate Trump and administration actions. But, he warned, he will respond in kind and government will suffer.