BOSTON, Jan 25 (Reuters) - A federal judge has blocked the Trump administration's push to terminate the legal status of more than 8,400 family members of U.S. citizens and green card holders who moved to the United States from seven Latin American countries. Boston-based U.S. District Judge Indira Talwani issued a preliminary injunction late on Saturday that prevents the Department of Homeland Security from ending the humanitarian parole granted to thousands of people from Cuba, Haiti, Colombia, Ecuador, El Salvador, Guatemala and Honduras. They had been allowed to move to the United States under family reunification parole programs that were...