MSNBC contributor Mark Halperin apologized late Wednesday for what he conceded was “inappropriate” behavior with women he worked with.CNN reported Wednesday that five women accused Halperin of sexual harassment after he gained a powerful perch as ABC News’ political director, a position he was named to in 1997. The women, who spoke to CNN on the condition of anonymity, accused Halperin of sexual harassment at ABC News, where Halperin worked until 2007.“During this period, I did pursue relationships with women that I worked with, including some junior to me,” Halperin, 52, said in a statement to CNN late Wednesday.