This was basically a vote against any kind of co-operation with Democrats. All Cantor wanted to do was pass sensible immigration reform. A bill where Democrats gave the house away to the GOP and included ALL the stuff they wanted, from having to wait in the back of the line, pay fines, learn English, etc.
Even though the GOP got everything they wanted in that bill, the hard right wants no part of it, and if you work with President Blackenstein on anything, we'll throw you out.
That's what happened tonight. The Tea Party failed almost unilaterally down the line on all these primaries, but tonight they knocked off a big fish.
In the end, it's good for the Democratic candidate in that district, who only needs to hang back and let the Tea Party wacko talk himself straight into defeat.