Asked by a reporter whether the US was confident Iran would now give up its nuclear ambitions thanks to the deal between Washington and Tehran, Republican Senator John Kennedy responded: "Unless you were home-schooled by a day drinker, no one is confident Iran is going to do anything."
It's a sign of the uncertainty at home about what the ceasefire agreement will mean.
The Memorandum of Understanding was signed in France, and Donald Trump claims it achieves everything and much more.
Alysia Thomas-Sam reports.
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