Sen. Tim Sheehy, R-Mont., joins 'The Sunday Briefing' to discuss failed peace negotiations between the U.S. and Iran and react to President Donald Trump's next steps.

The US and Iran are still communicating, a US official told CNN, after weekend peace talks failed to produce a breakthrough.

The US president repeated his vow to take further military action in the absence of a deal, claiming he “could take out Iran in one day” and listing water desalination plants and bridges among potenti...