"People are sick of the two parties. They're looking for an alternative. This is it," said Chris Vance, who announced recently that he had left the Republican Party.
Republican, Democrat launch centrist group in Washington →
"It is by far the most vulnerable of the four Republican districts" in Washington state, Vance said. "And it's going to be Trump, Trump, Trump, Trump, Trump."
Washington GOP congressman's retirement gives Democrats hope →