President Obama’s victory over Republicans in the government shutdown fight has boosted the popularity and fundraising of Senate Democratic candidates, easing concerns that an anti-Obamacare wave would give control of the chamber to the GOP in the 2014 elections.

Voter anger at the GOP, and especially the Republican-run House, has hurt the party’s chances of winning an additional six Senate seats to take the majority and handed the Democrats a new line of attack: GOP candidates can’t be trusted.