US Senate leader warns of imposing further sanctions against Iran

US Senate Majority Leader Mitch McConnell has said that further sanctions would be imposed on Iran if there is no agreement over the country’s nuclear program at the end of March.
“Another heavy dose of sanctions would be an appropriate remedy if there’s no agreement at all,” he told reporters on Tuesday.
With a deal in the next few days, American lawmakers would move ahead on a bill that would require President Barack Obama to submit the agreement for Congress' approval, according to McConnell.
President Obama, however, has threatened to veto any anti-Iran bill while the nuclear negotiations between Iran and the P5+1 group – the US, Britain, France, China, Russia and Germany – are underway.
A fresh round of nuclear talks is scheduled to resume in the Swiss city of Lausanne on Thursday with a planned visit between Iran’s Foreign Minister Mohammad Javad Zarif and US Secretary of State John Kerry.
The latest round of nuclear negotiations ended in Lausanne on March 20 after six days of intensive and serious talks with both Iran and the United States citing progress.
On Monday, 367 members of the House of Representatives signed a letter, telling Obama that any nuclear accord must constrain Iran's nuclear program for “decades” before Congress will roll back sanctions.
"A final comprehensive nuclear agreement must constrain Iran's nuclear infrastructure,” the letter said.
In any agreement, “Congress must be convinced that its terms foreclose any pathway to a bomb, and only then will Congress be able to consider permanent sanctions relief,” according to the letter.