The Jackson Presidency put a big stick in the wheel of any anti-dueling initiative, even if the former general career as a duelist was not as umblemished as Teddy Roosevelt's will be (Davy Crockett made sure of it).
Roosevelt was lucky that dueling pistols were outlawed, since he was a notoriously bad shot. The one time he almost got into a duel in the Dakota Territory and the other party demanded the use of pistols, despite the law, TR was forced to talk his way out of the situation. But he was a good boxer and so preferred his duels to be done through fisticuffs.