While Democrats celebrate Biden’s massive “comeback” on Super Tuesday, it seemed that the former Vice-President personally struggled to look mentally sharp, leading critics to wonder if “Sleepy Joe” is really capable to lead one of the world’s most powerful countries.

In another major flop, Vice President Joe Biden has mistaken his wife, Dr. Jill Biden, for his sister Valerie during his celebratory Super Tuesday speech. Biden began by saying that “It’s a good night and it seems to be getting even better, They don’t call it Super Tuesday for nothing.” Then Biden grabbed his wife’s hand and told the raucous crowd “This is my little sister Valerie and I’m Jill’s husband.”

Unfortunately, his sister was on the other side of the stage and as soon as he realized his well, embarrassment, Biden tried to cover up by saying that “Oh no, they switched on me. This is my wife, this is my sister, they switched on me.”

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Social media users also had a great time making fun of Biden’s gaffe. Twitter user Matt Walsh linked Biden’s mistake to Rep. Ilhan Omar’s incestuous relationship. “By calling his sister his wife, Joe Biden is making a bold play for Ilhan Omar’s supporters,” Walsh wrote.

Another social media pundit Scott Coleman remarked: “Joe Biden just walked out on stage and the first thing he did was call his wife his sister.”

Finally, Matt Deitsch commented “Joe Biden opened his speech calling his wife his sister and his sister his wife. This is the darkest timeline.”

Unfortunately, Joe really did seem to have a difficult time, having an entire week filled with gaffes. Earlier, in an interview with Fox News, Biden called host Chris Wallace as “Chuck.” During his appearance, the former vice-president said: “All right, Chuck, thank you very much.” Wallace replied, “Alright, it’s Chris, but anyway.” Biden awkwardly remarked, “I just did Chuck. I tell you what, man, these are back-to-back. Anyway, I don’t know how you do it early in the morning.”

Then, there’s another incident at his campaign stop in Houston Texas. Before the primaries, Biden asked everyone to support him for “Super Thursday” saying “Join us! Go to JoeBiden.com, sign up, volunteer, contribute if you can, but we need you very badly. Every vote matters tomorrow. Look, tomorrow is Super Thurs– Tuesday. And I want to thank you all,” eventually realizing his mistake. Biden jokingly continued “I’m rushing ahead, aren’t I?”

The president also made fun of “Sleepy Joe’s” long list of gaffes in his North Carolina rally. “Tomorrow, voters in states across the nation for Super Tuesday—not Super Thursday. Oh, he said Super Thursday! You can’t do these things. Can you imagine if I said Super Thursday? I would be over, right? I would be over,” Trump said to the roaring crowd.

Finally, “Sleepy Joe’s” bad memory did not stop there. During the same Houston speech, Biden managed to botch the Declaration of Independence.

In an effort to recite the lines, Biden started to mumble ‘“We hold these truths to be self-evident. All men and women are created, by the, you know, you know the thing.” While the actual line reads: “We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”