Tea Partiers and conservative DC-based super PACs have targeted seven GOP senators in Republican-leaning states they hoped to replace in this year's primaries. All of the Republicans in the cross hairs have won their primaries.
Tennesee Senator Lamar Alexander was the last, and Thursday's Tennessee primary marks the first time since 2008 that every GOP Senate incumbent has been re-nominated.
But the win of the "establishment" comes at a financial expense - the Senators who have been challenged have spent millions of dollars in this year's primaries - money they'd prefer to have now to spend running against Democrats.
We have the very latest for you tonight on Special Report with "Campaign Carl" Cameron.