Leaving aside the namecalling and deadcatting, and even the insurmountable Second Amendment problem for the minute, this STILL may not be true.
There is ample evidence that, had Bush pere not stabbed gunowners in the back in '91 or thereabouts, he'd have gained about 4-5 million votes, thus making his reelection that much easier just on progun votes alone. Those conservatives who questioned his "purity", and voted for Perot instead (?) might also have supported him.
Think of the results.
Those who have said here that the President wins NO Leftist votes for supporting a ban, but loses MANY conservative votes, are far from wrong. These are votes worth considering given the near-even split of the past election.