positing 11-dimensional chess to explain US politicians' choices is a losing game, usually.
with that as caveat, i think the biden administration's strategy is to tempt republicans into a set of demands that can be portrayed to the public as unreasonable and extortionate.
that creates *political* justification to defang the debt ceiling, using any of the variety of technical and legal workarounds available (and probably the ones Biden hasn't publicly discussed at all so far). 1/