Hey dimwit..universal background checks is enormously popular among the American people and rightfully so
If so, then where is the credible effort to amend the Constitution to allow it?
As long a the Second Amendment stands, such a law would be blatantly unconstitutional. The only legitimate way for such a law to be enacted would be to first amend the Constitution to overturn the Second Amendment. If there was really anything close to the level of public support for such a law, then the effort to so amend the Constitution would be well underway, if not already completed.
There is no such effort, because nobody who is in a position to initiate the process believes that there is anywhere close to enough public support to give such an effort any plausible chance of success. Which puts the lie to any claim that there is so much public support for any policies that would require such an amendment.