House Oversight Committee Chairman James Comer has been overpromising and underdelivering on assorted partisan conspiracy theories for quite a while, but the Kentucky Republican is, if nothing else, stubborn. After spending years trying and failing to dig up dirt on Joe Biden during his presidency, Comer is still pursuing the same goal now that the former Democratic president has retired.

To that end, the GOP congressman has been fixated this year on Biden’s use of an autopen — a tool every modern president from both parties has utilized — and as The Daily Beast noted, Comer is even prepared to go in an unexpected direction:

The MAGA lawmaker overseeing the investigation into former President Joe Biden’s autopen use has vowed to probe the former president’s judicial appointments. During an appearance on Fox News, Kentucky Rep. James Comer, who leads the House Oversight Committee, said his inquiry would ‘look at everything that was signed with the autopen,’ including executive orders, pardons, and nominees.

For those new to this story, the basic idea behind the partisan crusade is relatively straightforward: Republicans have spent months suggesting that there was some kind of elaborate conspiracy, involving unnamed officials in or around the White House, who used the presidential autopen to engage in all sorts of mischief — signing everything from executive orders to pardons — while taking advantage of the fact that Biden was so completely incapacitated that he had no idea what was going on around him.

The apparent partisan goal among GOP officials is to invalidate the documents the Democrat signed, opening the door to, among other things, prosecuting those Biden protected.

Is there any evidence to support the Republicans’ conspiracy theory? Well, no. In fact, the former president told The New York Times last week that while he, like his modern predecessors, utilized the autopen tool, he personally “made every decision,” and nothing was ever signed without his direct and express approval.

But the GOP fishing expedition continues anyway.

In fact, Comer’s interests appear to be broadening. When Fox News specifically asked the Oversight Committee chairman whether he’s prepared to examine Biden’s judicial appointments, Comer replied, “Absolutely.”

The Republican lawmaker didn’t explicitly mention any of the jurists by name, but in context, the segment began with a lengthy focus on Supreme Court Justice Ketanji Brown Jackson — Biden’s only appointee to the high court — and Comer could be seen on camera shaking his head in an apparent disagreement in response to the justice’s public comments.

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Comer added that, as part of his conspiracy theory, he believes it’s an open question as to whether Biden’s judicial appointments, each of which was confirmed by a majority of the U.S. Senate, “are legal.”

The Kentucky Republican added, “I think all of these are in jeopardy of being declared null and void in a court of law.”

In reality, it’s difficult to take any of Comer’s rhetoric seriously, but given that these bizarre comments are coming from the chairman of the House Oversight Committee, the GOP congressman is at least letting the public know where his misguided investigation is likely to go next.

This post updates our related earlier coverage.