He can veto it all he wants...if the Senate passes it by the same margin. The House had more than 2/3s vote for it.
If the Senate passes it by a veto proof margine he will lose.
Then his recourse is to ignore it. Only then do you discover of those in the House and Senate, who have been doing everything Obama wants for years, are serious about the country and their jobs.
When it comes to overriding a veto, previous yea votes will get changed to nay ones as needed.
Rats in the House could give themselves a fig leaf because it’s pretty certain that Rats in the Senate will not override Obama’s veto.
It’s all kabuki.