Rep. Michael Capuano says the Republican-led Congress is leaving congressional Democrats in the dark on the ongoing Russia collusion probe.

Capuano, a Democrat, told WGBH News he thinks congress should have more of a say in the ongoing investigation.

“Congress should be part of the solution and not part of the problem, and the Republicans who run congress right now will not even allow us to ask questions of this administration,” Capuano said during an interview with Boston Public Radio Thursday, “and that’s wrong.”

Capuano has voted twice in support of the impeachment of President Donald Trump.

The White House has consistently dismissed accusations of collusion between the Trump campaign and Russia in the 2016 election. That issue is at the center of the investigation by special counsel Robert Mueller.

Capuano said his recent more aggressive push for president Trump’s impeachment is not merely a function of having a challenger, though some critics say his anti-Trump rhetoric only increased after City Councilor Ayanna Pressley entered the congressional race.

“My first vote on that particular issue was before I even knew there was a challenger, I think it was December, if I remember correctly,” Capuano said. “It’s about Congress doing its job. There are clear and unequivocal and serious questions about this president, his family members, and his entire administration, starting with the Russian interference in this election.”

Capuano faces off against Pressley in a primary on Sept. fourth. Capuano and Pressley will debate on Greater Boston on WGBH on August 15.

To hear the full interview, click on the audio player above.