Blow By Blow: A Comprehensive Timeline Of The GOP’s 4-Year Battle To Kill Obamacare

The Affordable Care Act celebrates its fourth birthday on Sunday, just as its first enrollment period comes to a close.

It has been a long battle to get to this level of implementation — and the fight hasn’t ended yet. From Republicans’ initial resistance to repealing Obamacare in its entirety to their relentless effort to chip away at the law by targeting individual provisions, withholding funding, and undermining implementation, the party is showing no signs of abandoning its anti-Obamacare crusade any time soon.

On this anniversary, ThinkProgress takes a look back at all of the milestones in the GOP’s ongoing campaign to undermine a law that has defined national politics for half a decade: