GOP senator: 'Not appropriate' to ask foreign governments to investigate Biden

Sen. Rob PortmanRobert (Rob) Jones PortmanOvernight Defense — Presented by Boeing — Pence says Turkey agrees to ceasefire | Senators vow to move forward with Turkey sanctions | Mulvaney walks back comments tying Ukraine aid to 2016 probe On The Money: Senate fails to override Trump veto over border emergency | Trump resort to host G-7 next year | Senators to push Turkey sanctions despite ceasefire | McConnell tees up funding votes Senate fails to override Trump veto over emergency declaration MORE (R-Ohio) said on Monday that President TrumpDonald John TrumpZuckerberg launches public defense of Facebook as attacks mount Trump leaning toward keeping a couple hundred troops in eastern Syria: report Warren says making Israel aid conditional on settlement building is 'on the table' MORE shouldn't have asked China or Russia to investigate former Vice President Biden, but stressed that he didn't think the conduct warranted impeachment.
 
“The president should not have raised the Biden issue on that call, period. It’s not appropriate for a president to engage a foreign government in an investigation of a political opponent,” Portman told The Columbus Dispatch
 
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Portman is the latest GOP senator to distance themselves from Trump's public overtures to have Ukraine and China investigate Biden and his son, Hunter Biden. 

Speaking to reporters outside the White House on Thursday, Trump suggested that China and Ukraine should investigate the Bidens.  

The president added that he had not explicitly asked Chinese President Xi Jinping to open such a probe but that it’s “certainly something we can start thinking about.”
 
House Democrats are at the start of an impeachment inquiry centered on Trump asking the Ukrainian government to work with his personal lawyer, Rudy Giulani, to look into the Bidens, and allegations that he tried to withhold aid to Ukraine in an effort to get Kiev to launch such a probe.
 
In addition to Portman, GOP Sens. Susan CollinsSusan Margaret CollinsOvernight Energy: Perry to step down as Energy secretary | Future of big-game hunting council up in the air | Dems lose vote against EPA power plant rule Overnight Defense — Presented by Boeing — Pence says Turkey agrees to ceasefire | Senators vow to move forward with Turkey sanctions | Mulvaney walks back comments tying Ukraine aid to 2016 probe On The Money: Senate fails to override Trump veto over border emergency | Trump resort to host G-7 next year | Senators to push Turkey sanctions despite ceasefire | McConnell tees up funding votes MORE (Maine), Mitt RomneyWillard (Mitt) Mitt RomneyRomney appears to confirm name of secret Twitter account Graham: 'Stupid' for Trump to ask China to investigate Biden Turkey sanctions face possible wall in GOP Senate MORE (Utah) and Sasse (Neb.) have publicly pushed back after Trump publicly floated that China should start an investigation. 
 
Collins, over the weekend, called Trump's remarks "completely inappropriate" and said she thought he made a "big mistake by asking China to get involved in investigating a political opponent."

Sasse said in a statement on Thursday night that "Americans don’t look to Chinese commies for the truth."  And Romney pushed back forcefully, calling Trump's rhetoric "wrong and appalling."

No Senate Republican has backed the House's impeachment inquiry. 

“I don’t view it as an impeachable offense. I think the House, frankly, rushed to impeachment assuming certain things," Portman added to the Dispatch.