Maybe... just maybe... they have finally figured out that compromise with Democrats is not compromise at all, but surrender - because they lie without conscience, knowing that the news media will always cover for them.
Ronald Reagan agreed to tax hikes in exchange for spending cuts that never materialized. George Bush (41) allowed himself to be suckered into reneging on his "Read my Lips" pledge, and it cost him the Presidency (and without getting the spending cuts he was promised, either).
The only way to beat the Democrats is to deny them and ignore the screams. It's like dealing with toddlers.