Wait for the republicans to do a Corker switch: making it where Obama can cancel 2A and congress needs 3/4 to override.
Not quibbling, but please point out where the President derives the authority to cancel a Constitutional Amendment.
Now...as Commander in Chief he can proclaim a national emergency, and ride roughshod over Constitutional guarantees, as Lincoln did when he suspended habeas corpus. But that is subject to Congressional approval after ninety days. It would be a huge, huge leap for Obama to take.
Also, there is a special inviolability to the first ten Amendments which enshrine already extant human rights into the Bill of Rights.
And there is no House or Senate rule that requires more than a two thirds majority to override the President’s intent. Obama is a would-be dictator, but his powers are not as absolute as he would like them to be.
Now, if you are suggesting that the real threat to our freedoms is corruption among Republicans in Congress, then that’s a real issue. Most of them are IMO more interested in keeping their cushy jobs than representing their constituents, and that describes both parties.
In other words, “we have met the enemy, and he is us”.