The wife of the chairman of the powerful House Homeland Security Committee said he filed for divorce last month after having an affair with a younger woman, The Post has learned. Camie Green accused her husband, Rep. Mark Green (R-Tenn.), of “having an affair with a 32 year old woman” in a group text sent Wednesday to other lawmakers that was reviewed by The Post. “I have offered reconciliation, and he wants nothing of it and has insisted on a divorce,” she said in the message, which a congressional aide told The Post was also forwarded via email to offices...