WASHINGTON — A day after he voted to impeach President Donald Trump, Michigan freshman Republican U.S. Rep. Peter Meijer said he is buying body armor, changing his daily routines and taking other security measures in response to threats. “We are living in unstable times. There are 10 of us (Republicans) who voted for impeachment, and that puts a target on our backs both literally and figuratively,” Meijer told The Detroit News. “It’s something that I’m very mindful of. We’re trying to downplay this, but there’s escalating rhetoric. At the same time, where I come down is we need to press for ac…