The Tom Barrett campaign has announced a new gain, in the wake of Thursday night's release of a documentary video that showed Republican Gov. Scott Walker telling a wealthy donor last year that he had a “divide and conquer” strategy to take down organized labor: A local police union that had endorsed Walker in the 2010 election, is now instead endorsing Barrett.

The Barrett campaign e-mailed this announcement to reporters:

FRIDAY: West Allis Professional Police Association Endorses Barrett for Governor

WEST ALLIS -- The West Allis Professional Police Association will endorse Tom Barrett for governor at a news conference today at 11:00 AM CT.

The WAPPA endorsed Scott Walker in 2010, but is now endorsing Tom Barrett after witnessing Walker's 'divide-and-conquer' governing style over the past 16 months.

A more complete release will be issued following the news conference.