Obummer did make an EO or something about if a person on SS needed help with finances or filling out tax forms they couldn't have guns or some such nonsense.
And when the Trump overturned that stupid rule, the lie that is being told is that he overturned a rule taking guns away from mentally ill people. One person, when questioned, said if someone can’t take care of their finances they can’t handle a gun. If that were true, then half of congress fit into that category.