The original letter was slammed by the White House and Democrats as a "reckless" move as the Obama administration attempts to clinch a deal on Tehran`s nuclear program. The Republicans who signed the letter warned Iran that the next U.S. president could easily undo any agreement.
Cruz said Tuesday that he signed the letter partly because the prospective deal is not only "profoundly dangerous both to the security of our friend and ally Israel, but also to American national security."
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