I'd believe our Congressional delegations angst over the White House's decision if they didn't, right after the announcement, send out a robo-email to supporters with lines like this at the bottom of their screeds:

"Make a contribution and let’s organize together to take back the White House and Congress from anyone willing to turn a blind eye to climate change.
Thank you and keep fighting,"

Once again, follow the money....that is who is funding the agreement, and the angst behind the decision to un-sign from said agreement.