WATCH: Joe Biden's Senior Moment of the Week (Vol. 76)

In an effort to assuage public concern, the White House trotted out Biden's wife, first lady Dr. Jill Biden, Ed.D., who praised the 81-year-old president's "resilience" in an interview with MSNBC. Meanwhile, Biden bumbled his way through a number of public appearances as vigilant aides struggled to keep him from wandering off. During a speech in South Carolina, he claimed to have "started the civil rights movement." (He did not.)