By Mike McGann, Editor, The Times Somewhere out there is an imaginary digital cow being sued by a sitting member of Congress and he/she/it is fighting to keep our First Amendment rights, well, rights. @devincow is one of a number of Twitter accounts that exist to mock U.S. Rep. Devin Nunes (R-Cal.), the former head of the U.S. House Intelligence Committee. To be sure, few in American politics deserve...