It isn’t illegal to change how Electoral College delegates are allocated. If the Republicans want to change how Florida, Virginia, Pennsylvania, Ohio, Michigan, and Wisconsin allocate their votes from winner-take-all to by congressional district, they are within their legal rights to do so. And it appears that they have plans afoot to do exactly that in at least some of those states. The Democrats cannot retaliate in kind, but I imagine that we will go ballistic. It’s a very desperate move that acknowledges openly that the GOP no longer believes that they can remain a conservative party and win the White House unless they change the rules. And they would rather stay conservative than adapt or evolve to meet changing circumstances. I predicted that the GOP would make this move back on December 4th.
It still is not certain that they will succeed in their plans. The Pennsylvania GOP wanted to change the rules for the 2012 election but discovered massive resistance in their own ranks. From my understanding, safe members didn’t want Obama campaigning in their districts. If you remember the competition between Obama and Hillary Clinton, you know that Team Obama is very good at competing on a district level. But changing the rules will benefit future Republican candidates in a massive way.
There will be a huge backlash if the GOP attempts this, but they must think they no longer have any choice. They don’t want to change, so they will change the rules instead.