The senators outlined more than a dozen questions for Kerry.
The Republican senator said she can't vote for her party's nominee.
Tim Canova says he hasn't been contacted about setting up a schedule.
The DSCC pledged the standstill would have political consequences for Republicans.
Republicans are hoping to use the $400 million cash payment to Iran as a campaign issue.
The Judiciary chair says he has concerns about "ransom payments to terrorist groups."
Democrats blasted GOP senators for refusing to cut ties with Trump.
Sarah Ferris 08/04/16 02:48 PM EDT
Officials say money for vaccine development will be exhausted soon.
Republicans have blasted new details on the payment.
He said lawmakers have turned the disease into a "political volleyball."