When former Vice President Joe Biden commented Sunday night on the weekend's mass-shootings that killed 29 people, he misstated where in the United States they had taken place.

Biden, 76, referred to the rifle massacres as 'the tragic events in Houston today and also in Michigan the day before.' The carnage unfolded Saturday in El Paso, Texas and in the early hours of Sunday morning in Dayton, Ohio.

The Democratic presidential front-runner was speaking to a group of about 75 donors at a high-dollar fundraiser in San Diego.

Sunday night's event took place at the home of businessman Mark Arabo, an advocate for persecuted Iraqi Christians.

El Paso police arrested Patrick Crusius, 21, after the first shooting in a Wal-Mart store. In addition to killing 20, Crusius is accused of wounding 26 others.

Twenty-four-year-old Connor Betts mowed down nine people and injured 26 more at a popular Dayton restaurant hours later.

Joe Biden referred to the 'the tragic events in Houston today and also in Michigan' when talking about the shootings that actually took place in El Paso, Texas and Dayton, Ohio over the weekend

The first shooting on Saturday took place at an El Paso Walmart when a 21-year-old shooter opened fired, killing 20 people and injuring another 26

A second shooting rocked a street in Dayton, Ohio when a 24-year-old gunman killed nine, including his own sister, and wounded 26 more

Biden was speaking at a fundraising event in San Diego when he made the mix up – but this is only one mistake in a long list from the gaffe-prone candidate

'You know what, the president's words have meaning, no matter who he or she is. They are the face of America,' Biden said at the Sunday fundraiser, adding that he does not hold Donald Trump personally responsible for the shooting.

Biden is a gaffe-prone campaigner; he said last week during a Democratic primary debate that he opposed giving President Trump 'eight more years' in office.

At the Detroit debates last month, Biden said 'eight more years of Trump will change America in a fundamental way.'

The U.S. Constitution limits the president to just one more four-year term.

During a fundraiser in early May, Biden also mixed up then-British Prime Minister Theresa May with Margaret Thatcher.

'Margaret Thatcher, um, excuse me, Margaret Thatcher — Freudian slip,' Biden said to laughter at the May 4 event, according to a campaign pool report. 'But I knew her too.'

He then corrected himself by saying: 'The Prime Minister of Great Britain Theresa May.'

During the debates in Detroit late last month, Biden said the U.S couldn't handle another eight years of President Donald Trump

Trump can only serve another five-and-a-half years total if he were reelected in 2020

Biden also mixed up Theresa May and Margaret Thatcher when speaking at a fundraiser in May

'Margaret Thatcher, um, excuse me, Margaret Thatcher — Freudian slip,' Biden said. 'But I knew her too.' He then corrected himself, 'The Prime Minister of Great Britain Theresa May.' May (left) just resigned as prime minister in late May and Thatcher (right) was the first female British prime minister from 1979-1990

May announced she was resigning from her post as prime minister in late May.

Thatcher, who was the leader of the Conservative party in Britain, was the first female prime minister of the United Kingdom – serving from 1979-1990. She died in April 2013.

Biden was a U.S. Senator for Delaware during the time Thatcher was prime minister.

Despite his tendency to make mistakes and fumble over his words, Biden is the front-runner candidates of the more than two dozen running in the 2020 Democratic primaries.

In a recent average of top polls on RealClearPolitics, Biden is shown with holding 32 per cent support from likely Democratic primary voters.

Trump's nickname for the top candidate is 'sleepy Joe Biden,' which he says he has dubbed the former vice president because of his low energy. The president claims Biden wouldn't be able to keep up with him if they went head-to-head in 2020.