If it weren't obvious that Stewart was peddling false history, consider
In March 2016, Senate Majority Leader Mitch McConnell tried to justify denying a vote on Obama’s nomination of DC Circuit Court Judge Merrick Garland to replace Justice Antonin Scalia: “All we are doing is following the long-standing tradition of not fulfilling a nomination in the middle of a presidential year.”
There is no such tradition. The table shows the nine Supreme Court vacancies in place during election years in the Court’s post-Civil War era—once Congress stabilized the Court’s membership at nine and the justices largely stopped serving as trial judges in the old circuit courts. Those nine election-year vacancies (out of over 70 in the period) were all filled in the election year—one by a 1956 uncontested recess appointment and eight by Senate confirmation.
Franken left Alice Stewart figuratively battered and bloodied, as she deserved to be for spewing specious talking points. This is a price CNN pays for deliberately putting on the air Republicans who will distort and obfuscate, manipulate and lie, as long as they're not racist or hostile to immigrants. They are what once were termed "moderate" Republicans or (George HW) "Bush Republicans" or in the modern parlance of Bill Stepien, "Team Normal" of Republicans.
It usually works. A Republican comes on spreading GOP fiction on health care, workers' rights, tax cuts, inflation, the courts, or "Hillary."- and the host and Democratic guests are expected to hold their tongues and swallow it whole. Al Franken wouldn't play.