program resumed in switzerland on monday. the u.s. secretary of state met with the iranian foreign minister for five hours. no agreement of reached. and jim accosta reports there's another factor in negotiations. >> reporter: while iranian and u.s. official try make progress in their nuclear negotiations the talks in switzerland hit a speed bump in the form of a letter written by senator tom cotton and signed by 46 of his republican colleagues to iran's ruling clerics complaining about the nuclear talks. the obama administration says tear ran's negotiators raised cotton's letter with u.s. officials. >> i'm embarrassed for them. it's not how america does business. >> reporter: in a newly released excerpt from his interview advice the president blasted cotton. >> for them to address a letter to the ayatollah, the supreme