Obama Builds on Leads in Ohio and Florida

Has at least a 10 point lead in both states

U.S. President Barack Obama has expanded his lead over Republican challenger Mitt Romney in the southern state of Florida and the midwestern state of Ohio -- two of the most important battleground states in this year's presidential race.

A public opinion poll released Wednesday shows President Obama with more than 50 percent support in both states, part of the group of so-called swing states expected to decide the November 6 election.