Possibly you refer to the Democratic Party platform to get rid of the Hyde Amendment. Were that to happen -- which looks pretty impossible at this stage of political history, so the paranoia of the anti-abortion crowd is more excessive than usual -- , in fact the new situation would not "expand" reproductive rights, but end the régime that keeps those rights from being available to all women everywhere. 

And let's remember that the rhetorical "pay for abortions" does NOT mean "pay for any and all abortions." It only means there is some funding assistance for a very small, carefully defined number of abortions in pregnancies that endanger the pregnant women.