Tucker Carlson's Twitter show debut draws big numbers and controversy.

Former Fox News host Tucker Carlson has launched a new show on Twitter called "Tucker on Twitter" after being taken off the air by Fox News following a defamation lawsuit over false claims of election fraud. In the first episode, Carlson claimed without evidence that Ukraine was to blame for the destruction of a massive dam in Russian-occupied territory that caused widespread flooding. The show is expected to feature more political commentary from Carlson, who hopes Twitter will be a platform with "no gatekeepers."