Barack Obama has announced his endorsements for America's 2018 midterm elections in a series of tweets.

The former president endorsed 81 candidates vying for congressional seats, those running for the Senate, as well as candidates in various state level elections across the US.

Mr Obama wrote that he was "proud to endorse such a wide and impressive array of Democratic candidates – leaders as diverse, patriotic, and big-hearted as the America they’re running to represent.”

Republicans currently have control of both the House and the Senate. All 435 seats in the House up for grabs, while 35 are set to be contested in the Senate.

Democrats need to win more than 23 seats to gain majority in Congress.

Among those endorsed by Mr Obama, are Harley Rouda and Katie Hill from California, Sean Casten and Brendan Kelly for Congress in Illinois and Stacey Abrams for governor of Georgia.

“’I'm confident that, together, they’ll strengthen this country we love by restoring opportunity, repairing our alliances and standing in the world, and upholding our fundamental commitment to justice, fairness, responsibility, and the rule of law,” Mr Obama wrote. “But first, they need our votes.”

Barack Obama's best moments in the White House Show all 11 1 /11 Barack Obama's best moments in the White House Barack Obama's best moments in the White House May 19, 2009 “The President was leaving the State Floor after an event and found Sasha in the elevator ready to head upstairs to the private residence. He decided to ride upstairs with her before returning to the Oval Office,” Peter Souza Barack Obama's best moments in the White House Oct. 26, 2012 President Barack Obama pretends to be caught in Spider-Man's web as he greets the son of a White House staffer in the Outer Oval Office Peter Souza Barack Obama's best moments in the White House “A National Security staffer, Carlton Philadelphia, brought his family to the Oval Office for a farewell photo with President Obama. Carlton’s son, Jacob, softly told the President he had just gotten a haircut like President Obama, and asked if he could feel the President’s head to see if it felt the same as his.” Peter Souza Barack Obama's best moments in the White House March 21, 2010 The President, Vice President and senior staff applaud after watching on television the House vote on H.R. 4872 for health care reform, in the Roosevelt Room of the White House Peter Souza Barack Obama's best moments in the White House Dec. 3, 2009 President Barack Obama fist-bumps custodian Lawrence Lipscomb in the Eisenhower Executive Office Building following the opening session of the White House Forum on Jobs and Economic Growth Peter Souza Barack Obama's best moments in the White House Sept. 22, 2015 "The Obama family and Biden family greet Pope Francis as he arrives in the United States for the first time at Joint Base Andrews," Sept. 22, 2015. Peter Souza Barack Obama's best moments in the White House Feb. 21, 2014 President Barack Obama and Vice President Joe Biden participate in a "Let's Move!" video taping on the Colonnade of the White House, Feb. 21, 2014 Peter Souza Barack Obama's best moments in the White House Feb. 18, 2016 President Barack Obama watches First Lady Michelle Obama dance with 106-Year-Old Virginia McLaurin in the Blue Room of the White House prior to a reception celebrating African American History Month, Feb. 18, 2016 Peter Souza Barack Obama's best moments in the White House Jan. 21, 2013 "The President and First Lady wave to supporters as they ride in the inaugural parade. I had asked the President if I could ride in the presidential limousine and the President joked, 'But Michelle and I were planning to make out," Jan. 21, 2013. Peter Souza Barack Obama's best moments in the White House Barack Obama and former First Lady Michelle Obama share a private moment in a freight elevator at an Inaugural Ball, January 2009 all pics: Pete Souza Barack Obama's best moments in the White House Barack Obama rests his hand on the bible that President Lincoln used for his swear-in, being held by his wife Michelle Obama as he is sworn in as the 44th President of the United States of America Rex

Mr Obama recently made waves online when he shared the importance of empowering women to positions of leadership across Africa. While speaking at a town hall in Johannesburg, South Africa, the former president said men were getting on his “nerves recently.”