Senate Minority Leader Mitch McConnell finally relented and dropped his demand that the Democrats foreswear eliminating the legislative filibuster before he will agree to allow the new 50-50 Senate to pass an organizing resolution. The impasse was preventing the formation of committees and impairing many Democrats from taking over as chairmen.

McConnell’s action was dramatic. Before now,  a party which had lost its majority had never sought to hold onto control of the committees by insisting on a 60-vote supermajority to re-organize the body. It was basically a coup attempt, and it never stood any chance of sticking. But McConnell got what he could out of his antics. Democratic senators Joe Manchin of West Virginia and Kyrsten Sinema of Arizona made strong oral commitments not to scrap the filibuster, which McConnell used as his pretext for backing down. Sinema and, especially, Manchin are two of the most vulnerable Democrats, and they’ve upped the political cost they’ll pay if they later reverse themselves and vote to end the legislative filibuster.

It’s not much of an achievement for McConnell. If he uses the filibuster to stymie highly popular bills that are vital to the Biden administration’s agenda, he’ll give Manchin, Sinema and other reluctant Democrats the excuse and cover they need to change their mind and scrap the rule. And a filibuster isn’t worth much if you can’t use it without losing it.

The next question is whether McConnell will be strategic and restrained in his blocking strategy or if he’ll just obstruct everything until frustrations reach a boiling point.

One point is worth emphasizing. The unanimous consent rule provides that a single senator can block a motion to proceed and force a 60-vote threshold cloture vote, so McConnell can’t prevent a Josh Hawley, Ted Cruz, Mike Lee or Rand Paul from filibustering every motion Majority Leader Chuck Schumer introduces. It also means that at least 10 Republicans will have to vote with the Democrats on those motions in order for the Senate to do its business. McConnell hates when his caucus is divided, so he’s stuck in a difficult position. If he wants a unified caucus, he’ll have to block everything and punish aisle-crossers as he did during the Obama administration. But this will probably cause the Democrats to unify against the filibuster in response. If he wants to preserve the filibuster, then he’ll need to encourage his colleagues to vote with the Democrats on cloture motions most of the time. There are bad options, but he’s in a weak position.

As for the centrist Democrats, they also face a conundrum. In states like Montana and West Virginia where Trump easily won in 2020, Democratic senators do not want to be voting with the party over and over again on strictly party-line votes. They would vastly prefer the political cover that comes from bipartisan legislation. But if no Republicans will join them in voting for bills and everything gets blocked, then avoiding partisan votes also means avoiding getting anything done.

However, once the centrists realize that they cannot keep the filibuster without crippling the Biden administration, they’ll find that they’re in a position of maximum leverage. With the Democrats holding only a 50-50 majority (with vice-president Harris breaking ties), the party has to have their votes on nearly everything. If Manchin wants a provision added or dropped from a bill, his demand must be met. If people make too much of a fuss about it, he can just switch parties. He’d have a much smoother ride to reelection as a Republican anyway. Unfortunately, the Senate Democrats are also in a weak position with only bad options.

But, at least now, with McConnell backing down on his opposition to the organizing resolution, the committees can be formed and get to work.