The request by the three chairmen for an interview marks an escalation of the GOP probes into Ukraine and the 2016 election, which had previously largely been limited to sending letters requesting documents and information. It also signals that Johnson, Grassley and Graham are going to merge their investigative efforts, which had threatened to open up a turf war
in the Senate….
Republicans have pointed to a Politico article in 2017
that claimed that Chalupa, who left the DNC in 2016, continued to research ties between former Trump campaign chairman Paul Manafort
and former Ukrainian President Viktor Yanukovych, including asking Ukrainian Embassy officials for help.
Article URL : https://thehill.com/homenews/senate/473407-gop-senators-request-interview-with-former-dnc-contractor-to-investigate