In my opinion, next elections would look like this:
2000:
Sen. John McCain(R-AZ)/Gov. Tom Ridge(R-PA) 370 EV
President Al Gore(D-TN)/Vice President Dianne Feinstein(D-CA) 168 EV
2004:
President John McCain(R-AZ)/Vice-President Tom Ridge(R-PA) 447 EV
Former Vice-President Dianne Feinstein(D-CA)/House Minority Leader Dick Gephardt(D-MO) 91 EV
2008:
Sen. Barack Obama(D-IL)/Gov. Kathleen Sebelius(D-KS) 269 EV
Sen. Fred Thompson(R-TN)/Fmr. Gov. Mike Huckabee(R-AR) 269 EV
Obama wins in the House.
But this is only my opinion.
There is 0 chance Obama would have gone anywhere except to the Senate under that scenario.