At least 47 Republicans have cojones larger than an acorn. As to your question about Congress cancelling an Executive order, the president can veto it. It takes a 2/3 majority in both housed to override the veto.
It not the size of the cojones that matter, its the number of cojones.
It takes 120 cojones for cloture and 134 cojones for override. Which means the GOP needs 12 dem cojones for cloture and 26 dem cojones for override.
OTOH, the prez needs only one cojone to veto, or maybe only one half of a cojone.