Should patriotism belong to one political party? In this clip from GZERO World with Ian Bremmer, comedian and political commentator Bill Maher argues that Democrats have ceded too much ground by treating displays of national pride as inherently political. Maher says Americans shouldn't boycott the country's 250th birthday simply because President Trump is in office. "He doesn't own the country. He doesn't own the flag. He doesn't own patriotism,…