The Washington Post reports that “President Obama has decided to seek a new United Nations Security Council resolution that would call for an end to nuclear testing.” Going to the Security Council could represent a deliberate effort to bypass the Senate, which rejected the Comprehensive Nuclear Test Ban Treaty (CTBT) in 1999. Despite Obama’s adamant support for CTBT, senior officials have consistently pledged to pursue a nuclear test ban by means of a bipartisan dialogue with the Senate. Any effort to enact a test ban through the Security Council without the consent of the Senate would both violate these promises and subvert the checks and balances that enable lawmakers to restrain presidents in matters of national security.The way this worked last year was that the President got the UN Security Council to pass Resolution 2231, which ratified the so-called "Iran deal." Only then did he submit it to Congress for ratification, and without providing the full text along with any side deals as required by the Corker-Cardin law. Then, the Democrats filibustered the resolution of disapproval, so that the 'deal' was deemed to have passed without the Senate ever taking a vote on it at all.
Of course, the next President will be free to walk away from that 'deal,' since it was not ratified as a proper treaty. It's non-binding on Obama's successor, and if the UN doesn't like it they can go jump. Knowing this, the President is all in on electing his chosen successor, in the hope that she will continue his policy. (Good luck with trusting Hillary Clinton to keep her word once she doesn't need you any more, chief.)
Lacking willing Republican suckers to play along, the President won't be able to smuggle this one in on a filibuster. But he can still force his successors to be subject to the rhetorical cudgel that they have violated an agreement ratified by their ambassador at the UN. All he can accomplish here is to hand a weapon to America's enemies on the world stage.
So that's what he's going to do.