Jeff Flake actually said...
I fear that if we are reluctant, if this administration is reluctant, to even countenance legislation reaffirming Congress' right to reimpose sanctions or to actually continue sanctions, then we might be reticent to confront Iran in nonnuclear activity, and that this agreement might move leverage toward Iran here.
Context
Flake expresses concern about the administration's reluctance to impose sanctions on Iran.
01/20/2015