Sen. Sherrod Brown Sherrod Campbell BrownBipartisan praise pours in after Ginsburg's death Emboldened Democrats haggle over 2021 agenda Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election MORE (D-Ohio) said on Sunday that Americans know President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE doesn’t always tell the truth and many wonder about his relationship with Russian President Vladimir Putin.

Asked by “Meet the Press” host Chuck Todd if people care about the Russia investigation, Brown said there is interest.

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“People know he doesn’t tell the truth about a whole lot of things and I think people overwhelmingly wonder about President Trump when he calls everybody else names, including people in his own party, but he never criticizes Putin,” Brown said.

“I would guess 70, 80 percent of people in Ohio, including Trump voters, really do wonder what exactly it is between Putin and Trump that we don’t know details about yet,” Brown added.

Brown’s comments come shortly after Trump questioned the makeup of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s team and reiterated that there was no collusion between his campaign and Russia.

Mueller is currently leading an investigation into Russian interference in the 2016 election and possible collusion with the Trump campaign team.

Trump has not been critical of Putin and has yet to condemn Russia for meddling in the 2016 election, even though there is substantial evidence pointing to the Kremlin's involvement.