He overestimated the will for gun control in Congress.
Hold no illusions that the GA won't keep trying (though some are softening).
Federally it has to be part of some greater D plan in the coming election. Anyone in middle school or beyond knows there is no way he can get Federal gun restrictions thru the current Congress; I don't think there is any overestimation.
Their new buzzwords are "gun safety" and "sensible gun safety". I think we can bet on hearing those words in the coming GA session.