Obama supporters ready for his St. Paul rally tonight

Democratic presidential hopeful Barack Obama
Democratic presidential hopeful Barack Obama speaks at a rally tonight in St. Paul, after the polls close in the last two states to hold presidential primaries -- South Dakota and Montana.
Photo by Mark Wilson/Getty Images

South Dakota and Montana are holding the final two Democratic primaries of the year today.

After the polls close, Sen. Barack Obama is expected to speak at the Xcel Energy Center in downtown St. Paul, where he will likely shift the focus of the campaign from the Democratic primaries to the general election. Minneapolis Mayor R.T. Rybak is co-chair of Obama's Minnesota campaign.