It has become painfully clear to a majority of Americans that President Joe Biden, to say nothing of the mounting evidence of connections to son Hunter Biden's corrupt foreign business dealings and influence-peddling, lacks the physical and mental health to serve as president -- yet, he continues to seek a second term in office.

It has also become clear that the president's wife, first lady Jill Biden, has assumed a lead role in the 2024 re-election effort, as evidenced by a recent trip she took to Wisconsin, according to local NBC affiliate WMTV.

First lady traveled to Wisconsin on behalf of president

On Thursday, first lady Biden visited Madison, Wisconsin, where she was met by the city's Democratic Mayor Satya Rhodes-Conway and Sen. Tammy Baldwin (D-WI) and participated in a few events on behalf of President Biden's bid to be re-elected in 2024.

That included a tour of a facility researching cancer detection and treatment as part of the president's "Cancer Moonshot Initiative," followed by a roundtable discussion focused on cancer and black women.

Biden then attended an "educator appreciation event" with hundreds of public school teachers and union members, and the day was capped off with a campaign fundraiser event alongside Sen. Baldwin.

First lady campaigning and fundraising domestically and internationally

The first lady campaigning and fundraising on behalf of the president is not a complete surprise, as CNN reported in June that Jill Biden was gearing up to be an "active fundraiser" in support of her husband's re-election bid in the months ahead.

It is a reprisal of a role she played during President Biden's 2020 campaign, and will feature her advocating in support of the president's policy agenda in numerous solo visits to a variety of locations around the country, particularly in the all-important swing states.

According to a July report from The New York Times, it also involves the first lady traveling solo worldwide to help bolster international support for her husband to remain in office as the putative leader of the free world.

"Pursuing legislation or pushing a legacy-defining initiative is not the kind of activist role of first lady she wants to play," former Biden press secretary Michael LaRosa said of the first lady at that time. "In many ways, she’s much more comfortable as a permanent campaign spouse because the objective of every speech, event, or trip, whether it’s political or official, is in service of her husband’s agenda and lifting up his achievements."

Too old and not physically or mentally fit to be president

It is hard not to notice that the White House's increased usage of first lady Jill as an active surrogate on behalf of her husband comes President Biden himself appears to be increasingly constrained in his own efforts to advocate for public support for his serving a second term.

A big part of that is the consistent majority view of the American people that Biden is now too old and lacks the physical and mental health necessary to effectively serve as president of the United States. Indeed, ABC News reported in early May that around 68 percent of Americans said Biden was "too old" -- including 48 percent of Democrats -- and only around one-third of Americans thought he had the requisite physical and mental health to continue serving as president.

An NBC News poll found remarkably similar results in late June when it was reported that 68 percent of Americans said they had concerns about Biden's physical and mental fitness, including 55 percent with "major" concerns. Notably, the overall number of Americans with concerns about Biden's health included 43 percent of Democrats, a figure that was more than double the 21 percent of Democrats who admitted such concerns during the 2020 election.

More evidence of corruption and dishonesty

Alongside those concerns is the growing mountain of evidence that strongly suggests some level of knowledge and involvement of the president in his son's dubious foreign business dealings, with the latest addition being the discovery of more than 1,000 emails exchanged between then-Vice President Biden's office and Hunter Biden's Rosemont Seneca Partners firm -- hundreds of which Biden has now moved to block from public view with an assertion of executive privilege, according to the New York Post.

Those emails, obtained from the National Archives via a Freedom of Information Act lawsuit, revealed that "Hunter Biden and his business associates frequently used their direct line of communications with the Office of the Vice President to leverage access to the Obama White House" -- which directly contradicts and undermines President Biden's oft-repeated claim that he never had any knowledge of or involvement in his son's business dealings.