Mitch McConnell Fist Bumps Barack Obama at Biden Inauguration

Current and former U.S. leaders shared many jovial fist bumps, elbow taps and socially distanced waves during Joe Biden's presidential inauguration on Wednesday amid the ongoing coronavirus pandemic. But one fist bump in particular surprised the internet.

Former President Barack Obama greeted several people with fist bumps, including Vice President Kamala Harris and First Gentleman Doug Emhoff ahead of today's swearing in ceremony in Washington D.C.

Obama also shared a first bump with Biden, but some viewers were surprised when Mitch McConnell extended his fist to the Democrat.

"I just watched Obama and Mitch McConnell fist bump and I don't know how to feel about it," one user wrote on Twitter.

Another user added: "McConnell going for a fist bump with Obama is some odious audacity."

I just watched Mitch McConnell and Barrack Obama fist bump.

— WizardsWithGuns (@WWG_TV) January 20, 2021

Obama butted heads with McConnell countless times throughout his two terms as president, and their tense relationship continued under President Donald Trump, who often lashed out at Obama for allegedly doing a "bad job" in office.

On occasion, Obama would break tradition of not criticizing a sitting president and hit back. Last May, Obama called the Trump administration's response to the coronavirus an "absolute chaotic disaster" in a call with former staffers from his administration.

McConnell called Obama "classless" for his remarks in an interview with Trump 2020 senior adviser Lara Trump on Team Trump Online.

"I think President Obama should have kept his mouth shut," he said. "You know, we know he doesn't like much [what this] administration is doing, that's understandable. But I think it's a little bit classless, frankly, to critique an administration that comes after you. You had your shot, you were there for eight years."

McConnell also accused Obama of failing to leave the Trump administration "any kind of game plan for something like this," in reference to the COVID-19 pandemic.

In his inaugural speech on Wednesday, Biden invoked former President Abraham Lincoln in asking citizens to unite and end the "uncivil war."

"On this January Day my whole soul is in this. Bringing America together. Uniting our people. Uniting our nation. And I ask every American to join me in this cause," Biden said.

"We must end this uncivil war that pits red against blue, rural versus urban, conservative versus liberal. We can do this if we open our souls instead of hardening our hearts. If we show a little tolerance and humility and if we're willing to stand in the other person's shoes."

Obama and McConnell fist bump
Former President Barack Obama greets Senate Minority Leader Mitch McConnell during the inauguration of U.S. President-elect Joe Biden on January 20, 2021 in Washington, DC. Susan Walsh/Getty