NEW YORK (Reuters) -Monthly U.S. inflation data is under increased scrutiny after President Donald Trump removed the head of the U.S. Bureau of Labor Statistics, a move that could undermine confidence in the $2.1-trillion market for Treasury debt designed to protect against inflation. The Consumer Price Index, which will be released on Tuesday, will test investors' trust in the integrity of U.S. economic data after Trump fired the BLS head this month, accusing her of manipulating jobs numbers. It is unclear who will replace former BLS Commissioner Erika McEntarfer.