National Journal tells why President Obama wasn't saying goodbye to working buddies at his final State of the Union address.
Only 185 of the 435 members of the House were in Congress when Obama was a senator; 250 of his former colleagues on that side of the Hill have departed. In the Senate, only 45 of the current members served with Obama.
Why the turnover?
Lots due to voting with Obama in his first two years.
They were not invited to return to their positions.