While there’s still time for more challengers to gain traction, the Republican establishment is mostly holding its fire, a dramatic comedown from the brash, anti-tea-party rhetoric of last year.

The Crossroads offshoot, the Conservative Victory Project, hasn’t spent a nickel on a Republican primary in 2014. Neither has the Republican Main Street Partnership, the moderate GOP group led by former Rep. Steve LaTourette of Ohio. The chamber of commerce has intervened so far only in Republican primaries in Alabama, Idaho, and Kentucky, where Senate Minority Leader Mitch McConnell faces a bigger threat from Democrat Alison Lundergan Grimes than from Republican Matt Bevin.

Indeed, even as spring and summer primaries loom, most of the Republican and conservative spending targets Democrats on the ballot in November. At the forefront of the general-election assault is Americans for Prosperity, the group bankrolled by the Koch industrialist family. Most of its $30 million in spending has attacked Democrats over Obamacare, an issue that has proved far more unifying for the Republican Party than any of the issues that divide it.

“The narrative of a Republican civil war is always enticing for the media and as a fundraising angle for groups, but if you look at the number of contested, hot primaries this year, it doesn’t seem atypical,” said Tim Phillips, president of Americans for Prosperity.