Technically, if we get a super majority of constitutional conservatives in Congress come November, we could override any veto Obama would sign. 75 votes in the Senate, 327 votes in the House. The Senate has 36 seats up in Nov.. 34 would be needed.
This is a crazy challenge but “We the People” are angry and focusing on that goal could keep the fires hot till November.
It takes a 2/3 vote in both the House and Senate to override the President. And that won’t be anytime soon.
I don’t think the GOP has ever had 2/3 majority, except maybe during the Civil War.