Two GOP lawmakers want details on Iran's role in verifying its nuclear facilities.
The senators want to know how the program will be changed.
Sanders suggested Republicans would become increasingly "out of touch."
The top Senate Democrat praised his relationship with the Speaker.
“When some said Republicans could never recover, he never gave up,” the Senate leader said.
He said Boehner "tried to do the right thing under almost impossible circumstances."
The short-term bill includes funding for Planned Parenthood.
Cruz's push comes as lawmakers are expected to meet the Chinese president Friday.
The legislation wouldn't impact the current Congress.
But the glow of the pontiff's historic visit is likely to be short-lived.