For weeks now, House Republicans have grown increasingly sour on their prospects of impeaching President Joe Biden as their investigation fails to yield the evidence they were hoping for — and, according to CNN, Republicans are frustrated at House Oversight Chairman James Comer (R-KY), a key leader in the project.

"The prospect of their inquiry not culminating in impeachment has prompted some internal frustration among Republicans, with finger-pointing already underway in GOP circles about what went wrong — and who is to blame — even as the Republican-led committees continue to push on with their probe," according to the report.

"Some of the ire has been directed at House Oversight Chairman James Comer, who has spearheaded the investigation into Biden family business records."

Republicans can only afford to lose two votes from their caucus in a vote to impeach Biden and, according to the report, almost two dozen Republicans would vote against impeachment at the present time. Even if articles of impeachment could pass, there is no chance a trial in the Senate would convict Biden.

Even far-right Freedom Caucus figure Rep. Scott Perry (R-PA), a close Donald Trump ally who played a key role in the plot to overturn the 2020 election, has acknowledged, "I don’t know that the case has been made adequately to the American people" to impeach Biden. And one Republican insider told CNN, “You’d be hard-pressed to say it’s going well. It’s a jumbled mess.”

Comer, as well as House Judiciary Chairman Jim Jordan (R-OH), have pushed the impeachment on the theory that Biden's son Hunter's international business ventures were cover to launder bribes from foreign companies and entities to the president.

ALSO READ: Marjorie Taylor Greene wants GOP leaders to coronate Trump — right now

The problem is that no evidence of this has materialized. Indeed, witnesses to Hunter Biden's business projects called by Republicans themselves have disputed that the president ever had any involvement in these ventures.

However, some observers have suggested Republicans' plan is not to find evidence, but simply to cast increasingly wider and wider subpoena nets until the White House is unable to provide all the documents they are requesting, and use this to create obstruction of justice charges against the president.