The Cook Political Report changed its ratings of 15 House seats Friday, moving 14 of them in the direction of Democrats following the government shutdown.

“Mostly as a result of the damage House Republicans sustained during the 16-day government shutdown, we are making changes to our ratings in 15 House seats, all but one in Democrats’ direction,” Cook Political Report said in a statement.

House Republican seats Cook deemed more in danger include those occupied by Rep. Justin Amash (R-MI), Rep. Tim Walberg (R-MI) and Rep. Tom Reed (R-NY).

The Cook statement warned that while Democrats have acheived fundraising success recently, they still have a while before the 2014 elections.

“Democrats still have a very uphill climb to a majority, and it’s doubtful they can sustain this month’s momentum for another year,” the Cook statement says. “But Republicans’ actions have energized Democratic fundraising and recruiting efforts and handed Democrats a potentially effective message.”

Updated Friday at 12:24 p.m.