The White House has defended its policy of engagement with Iran with officials saying President Barack Obama is slated to meet top American Senators on Tuesday. The President will meet leading members of key Senate committees on the eve of the next round of talks between world powers and Iran in Geneva aimed at clinching an interim deal to boost diplomacy on ending a nuclear showdown. The talks come amid both parties on the Capitol Hill mulling slapping extra sanctions on Iran. As Obama prepared to brief lawmakers, a presidential spokesperson termed ‘exaggerated’ the reports of relief that Iran would get in the aftermath of a possible deal with the so-called six nation P5+1.