Here is the most recent ranking of Clinton’s likely VP choices, as seen by Fix boss Chris Cillizza:
#1

Julian Castro
Housing secretary from Texas
“He is a telegenic 41-year-old Latino from Texas. He complements her in virtually every way, demographically speaking. My working belief has long been that Castro was picked to be secretary of housing and urban development in the Obama administration at least in part so that he would have the experience and profile to be part of a national ticket.”
#2

Sherrod Brown
Senator from Ohio
“Stylistically, Brown, who has been a member of Congress and Ohio secretary of state and who is now a U.S. senator, is Clinton's opposite. Gruff to her polished. Populist to her, um, not populist. Blue collar to her white collar. And he's from Ohio — one of the swingiest states in the country. One downside for Brown: Picking him and winning puts a very competitive Senate seat in play.”
#3

Timothy Kaine
Senator from Virginia
“Kaine's profile — Christian missionary, fluent Spanish speaker, governor and now senator of a swing state — is outstanding. The one issue for him: He's a white male with "senator" before his name right now.”
#4

Thomas Perez
Labor secretary from Maryland
“The labor secretary checks two boxes for Clinton (and, yes, some of vice presidential picking is box-checking): He's well regarded in liberal circles, and he's Hispanic. The problem for Perez? Politico gets at it: "Aside from the wonkiest of Washington circles and the most progressive corners of the left, no one’s heard of Tom Perez."”
#5

Amy Klobuchar
Senator from Minnesota
“Klobuchar is an up-and-coming star in the party who represents a state, Minnesota, where Democrats would be favored to hold a seat in the Senate.”
Source Washington post