Former Republican lawmaker Walsh ends bid to challenge Trump for White House

Joe Walsh, a conservative former U.S. congressman-turned-radio show host, has ended his long-shot bid to challenge President Donald Trump for the Republican Party's presidential nomination and vowed to support a Democrat in November's election.

"I can't stop him in a Republican primary, but I can sure do my level best to try to stop him ... by bringing people together," Walsh told CNN in an interview on Friday.