"What we're hearing about on the ground is a tremendous amount of energy," Heck said. "We're going to gain seats in 2018 - it's just a question of how many."
Inward-looking House Democrats seek best way to make gains →
"It's been a pretty tough couple of weeks around here," said Rep. Denny Heck, Washington Democrat.
Export-Import Bank backers rally enough support to force House vote →