Meet The Press host Chuck Todd was a guest on MSNBC's Andrea Mitchell Reports Thursday morning and they discussed Tom Cotton's letter to Iran that was signed by 47 Senators that attempted to undermine US nuclear negotiations with Tehran.

Andrea Mitchell explained how genuinely upset John Kerry was during a hearing with Marco Rubio and she quoted John McCain as saying the letter was a mistake. Todd questioned their political smarts.

Todd: They did not realize what they were signing on? do they not realize how big of a deal this was going to be or how much it was going to be promoted?

Earlier in the segment Todd echoed even Megyn Kelly's sentiments - that the letter has polarized Democrats who would be aligned with Republicans against any deal with Iran. Todd also remarked that now, these 47 senators (including 2016 hopefuls could own a piece of diplomacy failure).

Todd: If you wanted to make a bipartisan case against the deal, well you've partisanized the issue and you've scared Democrats away...

Michell: Cause there are plenty of Democrats who are eager to sign on against a nuclear deal

Todd: There are so many, forget the actual policy and the historical precedent and all this other stuff, just on a political front - it was stupid.

Hillary Clinton attacked Republicans over the Iran letter during her press conference about Emailghazi and then tweeted this yesterday.

GOP letter to Iranian clerics undermines American leadership. No one considering running for commander-in-chief should be signing on.

— Hillary Clinton (@HillaryClinton) March 11, 2015