President Obama thanked his supporters on Twitter shortly after the Associated Press called Ohio for him.
"We're all in this together," the AP reported, "That's how we campaigned."
Ohio, with 18 electoral votes, is one of the most competitive states on the map. Obama won the state by 4.6 percent in 2008.
Early in the evening CBS Network projected Obama the winner in Wisconsin.
Republican leaders were steadfast on CBS 58 News to wait until all the votes were in.
In 2008, Obama won Wisconsin by 13.9 percent. The state, which carries 10 electoral votes, hasn't gone red in a presidential election since 1984. However, it has been a hotbed of partisan discord in recent years and Republicans saw huge gains at the state level in 2010.
Shortly after the AP called Ohio for Obama CBS New Network called the election for the President.