Mayor Bill White will formally enter the race for governor today, instantly becoming the Democrats' best hope of winning a statewide office in seven years. White, a three-term mayor who is balding and known for something of a bland personality, is expected use self-deprecating humor to tell a Hilton Americas crowd of supporters that he knows he is not a “perfect candidate” but is someone who can get things done. White has said he wants to end “strident partisanship” in Austin. He will tell supporters he wants to improve high school graduation rates and slow the rising costs of...