People with power don't threaten to do anything.
“I guess they GOP will have to move further left to capture a majority”
If you are in that mindset, You would vote for Obama, the GOP would have nothing to offer you. The GOP HAS no room to move left. What will they be, a low rent version of the dems? If you liked that position, there would be little to dislike about Obama.
And while nobody expected them to roll over, it is just as unreasonable that they think they can ignore every single thing we stand for, yet still expect our vote as their birthright.
You are correct, people with power don’t make threats. They stay home in November or write in. The GOP needs a lesson in power.