Dem Rep: ‘Deeply troubling’ Trump asked aides about Mueller interviews

Rep. Gerry ConnollyGerald (Gerry) Edward ConnollyTrump EPA eases standards for coal ash disposal Overnight Energy: Fewer than half of school districts test for lead | Dems slam proposed changes to Endangered Species Act | FEMA avoids climate change when discussing plan for future storms Overnight Energy: EPA watchdog won’t drop Pruitt probes | Exxon leaves conservative advocacy group | Lawmakers offer changes to Endangered Species Act MORE (D-Va.) said on Wednesday it was "deeply troubling" that President TrumpDonald John TrumpIran claims it rejected Trump meeting requests 8 times ESPY host jokes Putin was as happy after Trump summit as Ovechkin winning Stanley Cup Russian ambassador: Trump made ‘verbal agreements’ with Putin MORE reportedly asked his aides about their interviews with special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE

"That report is deeply troubling. The president knows there's an ongoing investigation by a special counsel. It is completely improper for him to interrogate witnesses after they have provided testimony to the special counsel," Connolly told CNN's Erin Burnett. 

"We saw this before in Watergate, and Richard Nixon was accused of suborning perjury. You cannot tamper with witnesses, you can't interrogate witnesses, and you can't counsel them on what they should say the next time they're called before the special counsel," he continued. "This is far beyond indiscreet. This is active interference with an ongoing investigation."

The New York Times reported on Wednesday that Trump asked at least two witnesses interviewed by Mueller for information about what they talked about during their meeting with Mueller's team. 

The publication reports that the president told White House counsel Don McGahn he should release a statement denying a previous Times report that said Mueller’s team had learned the president once asked McGahn to fire Mueller. 

Trump also reportedly asked former White House chief of staff, Reince PriebusReinhold (Reince) Richard PriebusWisconsin GOP Senate candidate rips his own parents for donations to Dems Wisconsin GOP Senate hopeful hit by ad highlighting Democratic past Matt Drudge shares mock ‘Survivor’ cover suggesting more White House officials will leave this summer MORE, how his interview with Mueller went, and if it was "nice."

Mueller is in the process of investigating alleged ties between the Trump campaign and Russian election meddling in 2016. 

The probe has also looked into whether the president has attempted to obstruct the investigation. 

Trump frequently refers to the probe as a political "witch hunt," and has denied collusion between his campaign and the Kremlin.