(St. Paul, MN) -- The research director and deputy communications director for Minnesota's D-F-L has apologized for a Monday tweet. It's the second time William Davis has had to backtrack on a controversial tweet. Davis posted a response to another tweet about the new U-S-S Minneapolis-St. Paul's launching by calling it a "murder boat." He deleted that later and apologized to a Navy veteran. He was suspended for a week last fall when he said Republicans should be led to the guillotines after election day.