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."
Naomi Jagoda 08/03/16 01:14 PM EDT
The Kansas Republican is a lead sponsor of a resolution to impeach John Koskinen.
Two senators want hearings on whether Trump's call to hack Clinton broke any laws.
Sen. Bill Nelson wants a deal to pass the legislation during a pro-forma session.
Democrats are demanding that GOP incumbents drop their endorsements of Trump.