If we won’t have a Second Amendment, then by extension we won’t have a First Amendment either.
Repealing the Second Amendment means passing & then ratifying a new Amendment. Look up Prohibition.
First the bill must pass both houses of Congress with a two thirds majority; then it must be ratified by three fourths of the state legislatures, thirty eight states. Yes, there is the alternate method, a Constitutional convention of the states. But that takes 34 states and it is conservatives driving the call to convene one.
For a close but no cigar amendment that failed to ratify, look up Equal Rights Amendment.
If Obama could have done “stroke of the pen, law of the land” to repeal the 2A, he would have. But he didn’t have that power.
I’m optimistic that the “blue wave” supposed to sweep Congress this fall will not happen. But we need Pres. Trump to keep us focused. Stemwinders like the one he delivered in TN are part of that.