A few reasons behind this...
1) The top "conservatives" on getbig support a lot of canddiates that are repub in name only. Jeb's no conservative, neither is Christie, and anyone calling themselves repub but saying we need Jeb/Christie in 2016 is just pushing for a second Dem ticket running.
2) The majority of the population supports lib positions on most issues. So while they may self-identify as independent to sound all rogue, or claim to be conservative to appear hard-working, they support the shit out of liberal issue positions.
3) it's hard to defend a lot of what the GOP support... and the GOP has so many diff positions. I mean, the party is SO SO split on amnesty.
4) Impeachment- they had public support and plenty of legit reasons to push for impeachment, and it's been off the table, with both rino candidates and rino supporters.
Libs are dominating right now, and it's not going to change until the party swings RIGHT and motivates the base repub voters that just don't give a shit about the RINOs, and won't fight for them. In 2008, libs FOUGHT for obama... how many texas conservatives are going to fight for chris fuccking christie? lol