Only certain types of contractors, and likely only in the short term.

Military contractors do well when the military has widespread support from the voters. Congresscritters will happily approve tax dollars going to the military industrial complex when their constituents view the US as the global protector of democracy. Wars like this one that aren't popular and make us look like thugs open the floor up to anti-military candidates. So yeah, the companies building missiles do well while the war is on, but the people like me who automate military fuel farms see budget cuts and projects cancelled.