NEW YORK — The bow tie is out at MNSBC. David Gregory is replacing Tucker Carlson as host of a one-hour show each evening.

The news network is making a handful of changes to respond to heavy political interest. Gregory's new show is called "Race for the White House" and will be on each weekday at 6 p.m. starting next Monday.

Carlson has been at MSNBC for nearly three years.

MSNBC also says that Andrea Mitchell will anchor an hour each afternoon. Keith Olbermann's popular "Countdown" program will rerun every night at 10.

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MSNBC is a unit of General Electric Co.