By Jan Wolfe and Lisa Lambert WASHINGTON, June 14 (Reuters) - The Justice Department will make its policies for obtaining records of U.S. lawmakers more rigorous after former President Donald Trump's administration secretly secured data on members of Congress, journalists and a former White House lawyer, the top U.S. law enforcement official said on Monday. Attorney General Merrick Garland in a statement https://www.justice.gov/opa/pr/statement-attorney-general-merrick-b-garland also said that "political or other improper considerations must play no role in any investigative or prosecutorial decisions" and that anyone within the department who fails to live up to that principle "will be met with strict accountability."