President Obama today conceded that he could fail to convince the American public to back proposed U.S. military strikes against Syria, but said that members of Congress should vote to approve the action anyway.

"It's conceivable that, at the end of the day, I don't persuade a majority of the American people that it's the right thing to do," Obama said in response to a question from ABC News during a solo press conference at the conclusion of the G20 summit in St. Petersburg, Russia.

But, Obama said, members of Congress need to consider the lessons of World War II and their own consciences and vote 'yes' to authorize the use of force, even if it means going against the opinion of the majority of their constituents.