Though, again it’s stupid to expect mass defections because electors are selected by the winning party in each state.

Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress; but no Senator or Representative, or person holding an Office of Trust or Profit under the United States shall be appointed an Elector.

I think the theory here is that the Penn legislature can do a quicky-rewrite of the state rules for designating electors before they're officially sworn in.