(CNN) In a new campaign video on Facebook, Senate Majority Mitch McConnell pitches himself as the man who can end the House's impeachment inquiry, a sign of how the chief Republican in the chamber might handle an impeachment trial should the House pass articles charging President Donald Trump with crimes.

"Nancy Pelosi is in the clutches of a left-wing mob," McConnell says directly to a camera. "They've finally convinced her to impeach the President. All of you know your Constitution. The way that impeachment stops is a Senate majority, with me as majority leader."

"But I need your help," he adds. "Please contribute before the deadline."

Last week, House Speaker Nancy Pelosi announced her support for an impeachment inquiry into Trump, asserting that Trump used his office for personal political gain in July when he asked Ukrainian President Volodymyr Zelensky to investigate former Vice President Joe Biden , a leading Democratic presidential candidate, and his son Hunter.

On September 25, a day after Pelosi's announcement, McConnell said Senate Republicans "support the established proper procedures" for considering a whistleblower's complaint at the center of the House's investigation. McConnell told Politico that the Democrats had "already overplayed their hand" and there was "no quid pro quo" between Trump and Zelensky, according to a White House's summary of the call. Democrats countered that Trump had held up nearly $400 million in U.S. aid to Ukraine not long before asking the Ukrainian leader to work with his personal attorney Rudy Giuliani on the probe into the Bidens, even though he did not explicitly mention the aid on the call. There is no evidence of wrongdoing by either Joe or Hunter Biden.

Read More