The framework deal on Iran's nuclear program has come under heavy scrutiny as the Obama administration seeks to sell the agreement to skeptical lawmakers.
Many of the terms mark a shift from President Obama's stated goals at the start of negotiations 18 months ago.
Democrats and the White House say those changes are the result of tough negotiations and are calling for time to allow diplomats to finalize the accord.
But Republican critics say the administration made concessions that go too far and secured little in return.
Here are five areas where the administration shifted course during negotiations:
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