Current and former officials say the crackdown is creating a climate of fear and harming national security.National security agencies across the Trump administration are ramping up investigations into alleged leaks to the news media, in some cases using polygraph tests that current and former officials say are creating a climate of fear and intimidation.At FBI Director Kash Patel’s direction, the bureau in recent weeks has begun administering polygraphs to identify the source of information leaks, an FBI spokesperson said. The new use of polygraphs at the bureau, which are commonly known as “lie detector” tests, has not been previously reported.“The...