Trump names Meadows as fourth chief of staff

US President Donald Trump announced Friday he had chosen staunch ally Mark Meadows to be his new chief of staff -- the fourth person to hold the position since he took office. Meadows, a Republican congressman from North Carolina, will replace the ultra-conservative Mick Mulvaney, who had been serving as acting chief of staff since Trump fired John Kelly in December 2018. "I have known and worked with Mark, and the relationship is a very good one," Trump tweeted, making the announcement.