No, actually, they can't. The 2nd says what it says and it is the law of the land regardless of what ANYBODY may declare to the contrary. Unless and until such time comes that the Constitution is PROPERLY amended so as to either change or eliminate the 2nd, like it or not, it stands as written and there is nothing the left can do about it. In the end I feel certain the left will find that the country will simply refuse to comply with any unconstitutional law, edict, regulation or executive order. Let's just hope, for all our sakes, that they don't have to find out the hard way.