Blythe Danner is backing President Obama. After attending a lunch of like-minded supporters at Michael’s on Wednesday, she attended the Cinema Society-Appleton Estate screening of “Seven Psychopaths” at Clearview Chelsea, wearing a “Women for Obama” pin. “He doesn’t blow his own horn — like we saw the other night even more than usual — so we have to get out there and blow it for him,” she told us. “He needs to put on the boxing gloves [for the next debate]. He’s such a gentleman.”