>> President Trump's expected move to decertify the Iran nuclear deal on Friday throws the ball back to lawmakers in the US Congress to decide what happens next. And that's putting Republicans on Capitol Hill in the unusual and uncomfortable position of fighting to defend one of former president Obama's signature achievements.
The reason? With the deal already in force and strongly supported by top allies, many Republicans who once hated the deal have come around to the idea that it is better to preserve and strengthen it than to kill it. US Deputy Politics Senator, Caren Bohan.>> Republican lawmakers have long hated the Iran deal.
But their worry here is that if President Trump declines to certify the deal and the deal ends up unraveling because of that, then that could undermine US credibility and the rest of the world because of a sense that the US doesn't stand by its agreements.>> The single worst deal I've ever seen drawn by anybody.
>> President Trump regularly tore into the Iran deal as a candidate. But rather than scrapping the deal, his likely announcement, Friday, will trigger a 60-day review period, when Congress can quickly slap new sanctions on Iran. That could set up a pitch battle between Republicans grudgingly supporting the deal and hawks eager to get rid of it.
And leading the charge to keep it alive is Senator Bob Corker, one of Trump's fiercest GOP critics. Corker has floated the idea of removing the rules requiring Trump to recertify the deal every 90 days which Trump reportedly hates. But after a brutal Twitter feud between the two men over the last few days, it's unclear whether or not they can still work together.
>> It does create awkwardness, but on the other hand, it's Corker's nature to wanna step in and try to solve problems like this.>> Republican lawmakers also preparing other strategies for how to save it, including pushing Iran for tougher inspections. They're also proposing a round of new sanctions against Iran's non nuclear activities to show that backing the nuclear deal does not mean they are going soft on Iran.