"Why are republicans in Virginia rigging the electoral college in that state to give unfair advantage to republican candidates?"
Well it is a HUGE problem with the US electoral system. The system is just a political football for both parties to push their own agenda. Take Voting, Republicans discourage voting because a low voter turnout favours them. Democrats encourage a big turnout because it favours them.
Who Wins, both parties. Who loses out, the people. Go to blackboxvoting.org
if you want to find out how voting machines and procedures are less regulated then your slot machines.