The Maryland Democrat is already facing resistance from MoveOn.org and others.
The New York Times reports Ben Jealous is taking a look at the open seat.
“I think he’s such an extraordinary talent,” the Democratic leader said.
The personal address was listed on documents given to Republicans last year.
Former first lady said she and George W. are watching the campaign from the sidelines.
American Action Network is going up with more than $500,000 in TV and digital ads.
Chris Van Hollen is already running but groups say he isn't progressive enough.
A Time for Truth: Reigniting the Miracle of America will explore 2016 themes.
Walker gets 18 percent compared to 16 percent for Bush.
Ahead of an expected April launch, she's bringing on a longtime Vilsack aide and two others.