Fight shapes up in Senate over Iran sanctions

The US Congress and President Barack Obama are on a fast track toward confrontation over sanctions on Iran.

A bipartisan group of senators is pushing a new round of penalties despite the president's warning that they would scupper delicate talks underway to prevent Teheran from being able to develop a nuclear weapon.

The Senate Foreign Relations Committee's hearing on Wednesday on Iranian sanctions is the opening round of the new Republican-led Congress' first foreign policy fight with the White House.