The Obama administration may have agreed to the treaty, but it was not a treaty that they submitted to the Senate for ratification as required by the Constitution.  Why not, if they felt it so important?  The measures agreed to will impact the American economy and therefore the representatives of the people should have had the opportunity to discuss, analyze the impact on the country and approve participation before that administration committed to it.  Why did the Obama administration lead the other countries to believe we were committing to a treaty without following our own laws?

At least if we can stop sending umpteen people across the globe to these climate meetings, we'll save some carbon emissions.  The great irony in all these various agreements is that they don't use modern technology to have the meetings instead of flying a bunch of private jets around to discuss how we're destroying the planet.