Just before Madam Secretary formally chose Tim Kaine as her running mate, the "Huffington Post" ran this article:
Her pick is widely viewed in Washington as a sign of her governing intentions. The former secretary of state has spent weeks attempting to woo progressive supporters of vanquished primary challenger Sen. Bernie Sanders (I-Vt.). Choosing from one of the handful of names on her short list ― Sens. Elizabeth Warren (D-Mass.), Sherrod Brown (D-Ohio) or Jeff Merkley (D-Ore.), for instance ― would signal that her camp is taking progressive concerns seriously.
Kaine, by contrast, is setting himself up as a figure willing to do battle with the progressive wing of the party. He has championed the Trans-Pacific Partnership trade deal that both Sanders and Warren oppose, and he is now publicly siding with bank deregulation advocates at the height of Clinton’s veepstakes.