President Manny Pacquiao??
It's possible ... because the boxer appeared on "TMZ Sports" (airing Thursday at 9PM PT on FS1) and said he isn't ruling out a presidential run in the Philippines when he retires from boxing.
PacMan told us he plans to run for a seat in the senate after his fight with Timothy Bradley in April -- and when we asked if he eventually plans to run for the highest office in the land, he didn't exactly say no.
Manny's promoter Bob Arum has been saying for months that Pacquiao will run in the 2022 election ... after he serves in the senate.
Hail to the future Chief.
Check out "TMZ Sports" weeknights on FS1.