The U.S. had expressed "concerns" about the Egyptian election.
"I'm not prepared to sign off on the delivery of additional aid," Leahy said on Senate floor.
Ties between the administration and Saudi Arabia have frayed over Iran, Egypt.
The move comes months after the military removed Mohammed Morsi from the presidency.
Robert Beecroft will be replaced in Baghdad by Stuart Jones.
U.S. relations with Saudi Arabia have chilled. Obama visits Riyadh on Friday.
“We remain deeply concerned about the ongoing lack of freedom of expression and press freedom in...
A prominent Muslim opposition group in Egypt dismissed President Obama's planned speech in Egypt as...