Resign if you disagree with the Constitution of the United States in it's entirety.

The Constitution Of the United States, with it's amendments, was set down as the law of the land was set down as the law of the land in 1789. It has been changed much over the past 226 yrs from the original, but the core of it has remained the same. The 2nd Amendment gives the right of all citizens of the US to own firearms. If the POTUS is unwilling to abide by this right of US citizens, he must resign his office. Executive Decisions should not pertain to anything to change the core amendments, as this should only be the power of Congress and the popular vote.