These independents and Republicans supported Democrats based on a message indicating that the party would be a true Big Tent -- that we would welcome a diversity of views even on tough issues such as abortion, gun rights and the role of government in the economy.
This call was answered not just by voters but by a surge of smart, talented candidates who came forward to run and win under the Democratic banner in districts dominated by Republicans for a generation. These centrists swelled the party's ranks in Congress and contributed to Obama's victories in states such as Indiana, North Carolina, Virginia, Colorado and other Republican bastions.
But now they face a grim political fate.
The political dangers of this situation could not be clearer.