If the President vetoes a law how can Congress "check' that action?

they can check but can also agree to it, again Supreme Court Has a final say in lawmaking

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.