Et tu, Mitt? Trump blasts Republican senator as impeachment battle heats up

WASHINGTON/ATHENS, Oct 5 (Reuters) - U.S. President Donald Trump on Saturday opened a new front in the impeachment battle that threatens his administration, blasting a prominent member of his party for criticizing his push to get foreign nations to probe a leading Democratic rival.Romney, who lost the 2012 election to Democratic incumbent President Barack Obama, criticized Trump on Friday for asking China to investigate former Vice President Joe Biden, who is seeking the 2020 Democratic presiden