LIVE: President Joe Biden campaigns in Madison, Wisconsin | USA TODAY

As Joe Biden contemplates his political future, facing calls from within his own party to abandon a reelection bid, the 81-year-old Democratic president is making a critical stop in this battleground state Friday in a show of commitment to see his campaign through. Biden will visit Wisconsin's voting powerhouse of Madison, holding a rally at a city middle school and taping a primetime interview with ABC organized to help overturn public fears of a lagging mental acuity. The stop, perhaps the most important for Biden this campaign cycle, comes as the president continues to deflect concerns from Democratic donors and his political colleagues over the president's ability to defeat Republican presidential candidate Donald Trump and to carry out the duties of president for the next four years following a stunning debate performance during which Biden lost his train of thought and at times made nonsensical statements.