Repetition makes media messaging more powerful.

This can be repetitions of anything you can think of: gestures, text, phrasing, images, associations, music stings, angle, etc.

Major news networks know this. The theatrics of news media are very obvious once you spot them. The bit that gets repeated the most is what you're meant to take away.

Keep in mind, US news outlets are motivated by profit first. Their job is to sell you things and they also sell your attention.