It seems the Biden administration supports the recognition of the District of Columbia as another US state. This raises the question of what will it take for this to happen?
Obviously, such a state would add 2 likely-Democratic-party senators, so Democrats would tend to support it and Republicans to oppose. On the other hand, such an addition would deprive the farther-right-wing Democratic-party senators like Manchin and Sinema from some of their leverage in the currently 50/50-split senate - so they (and maybe others?) have some motivation to oppose this, or abstain or be absent.
As for the procedure, is it like passing a law? If that's the case, it would be subject to a filibuster; and there will be the question of whether this can be included in a budget reconciliation procedure or not.
Otherwise, if there's a different procedure - what kind of majorities are necessary? And how long is the procedure (ignoring arbitrary delays)?
Note: A separate question regards possible relevant changes to the constitution regarding this transition.