May 23 (Reuters) – Harvard University sued the Trump administration on Friday over its decision to revoke the Ivy League school’s ability to enroll foreign students, ratcheting up White House efforts to conform practices in academia to President Donald Trump’s policies. In a complaint filed in Boston federal court, Harvard called the revocation a “blatant violation” of the U.S. Constitution and other federal laws, and had an “immediate and devastating effect” on the university and more than 7,000 visa holders. “With the stroke of a pen, the government has sought to erase a quarter of Harvard’s student body, international students