John McCainJohn Sidney McCainOvernight Energy: Lake Mead's decline points to scary water future in West | White House leads opposition to raising gas tax | Biden taps ex-New Mexico lawmaker for USDA post Lake Mead's decline points to scary water future in West Five takeaways from the Biden-Putin summit MORE conceded the presidential election to Barack ObamaBarack Hussein ObamaMichelle Obama shares Father's Day tribute: 'Our daughters couldn't have asked for a better role model' Biden raised key concerns with Putin, but may have overlooked others Democrats have turned solidly against gas tax MORE and called for his backers to come together with supporters of his former opponent.

McCain said that the American people had spoken clearly. He also recognized the historic nature of Obama's win.

"I recognize it what it means for African-Americans," McCain said. "I always believe that America offers opportunity for all who have the industry and will to receive it."

He added also put out a call for unity behind the new president-elect.

"Sen. Obama and I had argued our differences and he has prevailed," he said. "No doubt many of those differences remain. These are difficult times for our country, and I pledge to him tonight to do all in my power to help him lead us in the many challenges that we face."

He added: "I urge all Americans who supported me to join me in not just congratulating him, but offering our next president good will and earnest effort to find ways to come together to find the necessary compromises to bridge our differences."