MADISON, Wis. (AP) -- As Gov. Scott Walker this week promotes the release of his book "Unintimidated," new details are emerging about a criminal investigation reported to be focusing on his campaign and conservative groups.
Wisconsin Democratic Party Chairman Mike Tate said Monday reports about the investigation are one of the main reasons Walker needs to be defeated next year.
The Wall Street Journal reported Friday in an editorial that Walker's campaign and more than two dozen conservative groups have been subpoenaed by a special prosecutor. Wisconsin Club for Growth director Eric O'Keefe told the paper he received a subpoena in early October and that at least three targets had their homes raided.
O'Keefe hasn't returned calls and emails from The Associated Press. The special prosecutor, Francis Schmitz, didn't immediately respond to messages Monday.