JACKSON, Miss. (AP) — President Donald Trump's former chief strategist Steve Bannon has declared war on the Republican establishment, and now he's amassing his troops.

Bannon is promoting challengers to GOP incumbents and the party's preferred candidates in next year's midterm elections. It's an insurgency that could imperil Republican majorities in the House and Senate.

In his speech to the "Values Voters Conference," Bannon also singled out Wyoming Senator John Barrasso for criticism for not speaking out against statements made by Tennessee Senator Bob Corker.