Political historian: 'I don't believe that you should base impeachment upon politics'

Political historian Allan Lichtman said on Thursday that even though Democrats have grounds to begin an impeachment inquiry against President TrumpDonald John TrumpTrump conversation with foreign leader part of complaint that led to standoff between intel chief, Congress: report Pelosi: Lewandowski should have been held in contempt 'right then and there' Trump to withdraw FEMA chief nominee: report MORE, he argued that it shouldn't be a political decision. 

“I don’t believe that you should base impeachment upon politics,” Lichtman, an American University professor who has correctly predicted the outcome of the previous nine presidential elections, told Hill.TV. 

“But in this case, there is no rift between doing what is constitutionally and morally right and what is politically right,” he added. 

Lichtman said the division among Democrats over whether to pursue an impeachment inquiry against Trump shows they are struggling over doing what is right and what is “politically expedient."

“Impeachment now is now on everyone’s lips, although I would say some like [Speaker] Nancy PelosiNancy PelosiPelosi: Lewandowski should have been held in contempt 'right then and there' Democrats bicker over strategy on impeachment Overnight Health Care — Presented by Partnership for America's Health Care Future — Pelosi set to unveil drug price plan | Abortion rate in US hits lowest level since Roe v. Wade | Dems threaten to subpoena Juul MORE [D-Calif.] would like us to zip our lips about impeachment,” he said. “Democrats seem to be struggling between doing what is right and doing what is politically expedient.” 

A growing number of House Democrats have called for an impeachment inquiry following special counsel Robert MuellerRobert (Bob) Swan MuellerLewandowski says Mueller report was 'very clear' in proving 'there was no obstruction,' despite having 'never' read it Fox's Cavuto roasts Trump over criticism of network Mueller report fades from political conversation MORE’s remarks last week when he said he didn’t have the authority to charge Trump with any crimes.

Pelosi has long resisted pursuing impeachment, and Democratic leaders are pursuing other avenues, including holding Attorney General William BarrWilliam Pelham BarrGOP signals unease with Barr's gun plan NRA says Trump administration memo a 'non-starter' Sinema touts bipartisan record as Arizona Democrats plan censure vote MORE in contempt over Mueller's report.

Additionally, House Judiciary Committee Chairman Jerrold NadlerJerrold (Jerry) Lewis NadlerPelosi: Lewandowski should have been held in contempt 'right then and there' Nadler's House committee holds a faux hearing in search of a false crime Lewandowski says he's under no obligation to speak truthfully to the media MORE (D-N.Y.) is looking to launch public hearings on Mueller’s investigation, even though the now-former special counsel has made it clear he does not want to testify. 

—Tess Bonn