KEY POINTS
  • Joe Walsh, a conservative former U.S. congressman turned talk show host, on Sunday became the second Republican to challenge President Donald Trump for the party's 2020 White House nomination.
  • Walsh, 57, announced his long-shot bid to unseat Trump, who has strong support among Republicans, after sharply criticizing the Republican president as a liar and a bully who is unfit for office.
  • "I'm running because he's unfit," Walsh told ABC's "This Week" program. "Somebody needs to step up."
Joe Walsh, a conservative former U.S. congressman announces his intention to challenge President Donald Trump for the Republican party's 2020 White House nomination, in Washington D.C. U.S., in a still image taken from his campaign video obtained by Reuters on August 25, 2019.

Joe Walsh, a former Illinois congressman and tea party favorite turned radio talk show host, announced a challenge Sunday to President Donald Trump for the Republican nomination in 2020, saying the incumbent is unfit for office and must be denied a second term.

"He's nuts. He's erratic. He's cruel. He stokes bigotry. He's incompetent. He doesn't know what he's doing," Walsh told ABC's "This Week." The longshot portrayed himself as a legitimate alternative in party where he said many are opposed to Trump but are "scared to death" of saying so publicly.