And yet, despite the banter, the crux of the issue is the feasibility of it all.
The crux of the problem remains on this side of the Pacific.
Breaking up the banks should lie at the crux of the debate in the White House, Congress, and amongst global financial leaders.
1814, "cross," from Latin crux "cross" (see cross (n.)). Figurative use for "a central difficulty," is older, from 1718; perhaps from Latin crux interpretum "a point in a text that is impossible to interpret," in which the literal sense is something like "crossroads of interpreters." Extended sense of "central point" is from 1888.
crux (krŭks, kruks)
n. pl. crux·es or cru·ces (krōō'sēz)
A cross or a crosslike structure.