Voters would have been ready for change by 1972:
Humphrey 94 EV / 43%
Reagan 444 EV / 55%
(I know, the map looks funny with WV red and MD blue)
I doubt this map would even be close to accurate if HHH accomplished the end of the war and the economy stayed roughly the same as it did IRL.
I hope so, but racial unrest might have increased (as much as I would like to think the contrary) and HHH might be blamed for higher unemployment (5.6% in '72 vs 3.5% in '68). Especially if HHH advocated for busing (as my AP History teacher thought he would), he would have lost Macomb County, Michigan, and the nation.