The posted article is odd in that Levin's name is in the title, but he's barely mentioned in the article. Nevertheless, I agree with you completely.
This is truly a all-hands-on-deck moment. If Hillary wins, she'll destroy the Republic.
Levin can't (or won't) see that. He'd rather spend his time discussing theoretical changes to the Constitution. Does he not understand the power of today's federal government to bribe and to disrupt? Does he really think Hillary would allow a Constitutional change that she disapproves of? No more than Stalin would.
Regardless if Hillary becomes president or not she would have no say so on any Article V COS. It is called by 2/3 of the states and amendments are proposed. Those that receive enough votes then move on through the regular amendment process with each amendment requiring that be approved by the state legislature or state convention and if 3/4 of the states pass them they are ratified and become part of the constitution.
The President veto power cannot be used to stop an amendment.