Cannot make it retroactive. Look at the 2000 election between Bush and Gore when the rats tried to change Florida state election laws after the election to benefit their recounting efforts. The Federal Supreme Court stepped in and overruled the Florida Supreme Court preventing them from making any such changes. So such a change would be very nice, it is impossible. What would be nice if the Federal Supreme Court would simply be interested in upholding the current laws on the U.S. Constitution.
Can’t be done... sorry...