HEMPSTEAD, N.Y. (AP) -- President Barack Obama and Mitt Romney have had a number of pointed exchanges during the second presidential debate, challenging each other on energy policy, pointing fingers and often speaking over one another.

Without a desk between them, the candidates approached each other on stage at one point during a discussion on energy.

As Romney answered a question on gas prices and oil drilling, Obama stood up and moved toward his Republican challenger. Romney turned to the president's direction and they quarreled as they stood only a few feet apart.

At one point, Obama sharply rejected Romney's arguments, saying, "Not true, Gov. Romney."

When Obama interjected with his energy positions, Romney responded, "You'll get your chance ... I'm still speaking."