Analysis: The most important question the Biden-Trump debate may answer for voters

​ President Joe Biden and former President Donald Trump differ on many important issues – from taxes to immigration and climate to Ukraine – that will likely provoke intense arguments when they meet for their first debate on CNN Thursday. Yet more lasting than the substance of any of these confrontations may be the conclusions voters draw from them about each man’s ability to lead the nation over the next four years. Read More Breaking News, Latest News and Videos | CNN