Donald Trump's appeal to blue collar voters gives Democrats concern - unless they believe the conventional wisdom.
How does the conventional wisdom work with an unconventional candidate?
But not everyone shared Rendell’s optimism. Jim Kessler, senior vice president for policy at the centrist Democratic think tank Third Way, argued that Trump was an asymmetrical challenge for the party.
“He’s unlike a candidate like [Sen. Ted] Cruz, in which you can predict with assuredness where he will play or fall flat. Trump is a variable who has exceeded expectations,” Kessler said. “Until he stops exceeding expectations, I will worry.”