Yesterday, Steve Benen wrote a post titled, “ACA repeal crusade over, ‘delusional folks notwithstanding’.” Here’s part of it:

Last year, Republican officials up and down the ballot argued the 2012 elections were the party’s last chance to derail the Affordable Care Act. Once they lost those elections, Republican officials declared, “Never mind what we said before; this budget fight really is our last chance to derail the Affordable Care Act.” And now they’ve lost this round, too.

There won’t be a third. The repeal crusade was a flop.

Sure, it’s possible congressional Republicans will vote a few more times to gut the law — at last count, I think we’re up to 46 repeal votes in the House — but it’s slowly dawning on the party that their dream will not be realized.

They can try to go through the motions in the months and years ahead, but it’s more likely to create eye-rolling than results.

I’m so tempted to agree with Benen. The law has been through so many challenges the past couple of years that it is just about set in stone. But I see one more possibility for how Republicans could derail it:

We’re two weeks into the open-enrollment period for Obamacare. This period lasts until March 31 and it’s the time when individuals can sign up for health insurance on the exchanges. On January 1st, Obamacare goes live and those health plans kick in. That’s when the law really starts. Right now, we’re still in the sign-up phase. So far, that sign-up phase has been an unmitigated disaster. If you’re an Obamacare supporter, you should be very, very concerned. By all accounts, the flaws in the online exchanges aren’t a result of traffic overload or glitches. They are much more systemic and widespread and will require a huge amount of work to get them operating properly. The Administration still has a lot of work to do.

In addition, the government shutdown has masked these problem. Some people think the problems are actually a result of the shutdown, which isn’t true. Once we’re past these fiscal fights, the media’s attention will turn to the mass problems with the exchanges. People will start realizing that there are serious issues here.

The question is how long they will last. If December comes and there are still issues, the Administration should become very worried that people will start seriously turning against the law. Of course, it will have nothing to do with the policy behind Obamacare, but a technical failure can still switch public opinion fast. If people lose faith that the government has the capability to implement it. they may give up. Imagine January 1st coming and people still having trouble signing up on healthcare.gov. That would be a colossal failure.

Two weeks after that, the continuing resolution in the Reid-McConnell plan expires. This would give Cruz and Co. yet another chance to try to spur grassroots support and demand a delay in Obamacare in exchange for funding the government. That plan blew up in their faces the last couple of weeks, but the Tea Party would have a lot more support this time around. Independents may start looking at those demand as reasonable if the exchanges are still having major troubles.

This is the final challenge for Obamacare: does it work? For months, the focus has been on rate-shock and whether the policy would help most Americans. Few people wondered whether the exchanges would actually function correctly. Now, that question is at the forefront of the debate. Under normal circumstances, a Democratic president and Democratic Senate would ensure that the law has plenty of time to work out its kinks, well past January 1st if necessary. They would accept the bad media coverage and keep working on healthcare.gov until they got it right. But the McConnell-Reid deal presents a potential opportunity for Cruz and the Tea Party to mount a grassroots effort that really could force the president to reexamine his greatest legislative achievement. It’s timed perfectly for Republicans to mount a serious challenge to defund or delay the law on legitimate grounds. The Administration ultimately controls the viability of this challenge, but the McConnell-Reid makes it possible. The Obamacare battles never seem to end.