In Michigan, incumbent Republican squish Joe Schwarz is facing a
challenge from Club for
Growth-backed conservative Tim Walberg, and could very well
lose. Official results from that race will appear
here. CfG also has a dog Colorado's 5th district, where
they back Doug
Lamborn in the Republican primary. (I can't find a results link
for that one at the moment, but I'll add one if I can.) UPDATE:
Here's a link that'll have results for CO-5 (as
well as the contested Democratic primary in CO-7).