A rally held in St. Louis, Missouri by Democratic presidential hopeful Barack Obama on October 18, 2008 drew a record-breaking 100,000 people into the crowd. The rally was held under the Gateway Arch on the Mississippi River and is Obama's largest crowd draw in the United States in the 2008 election campaign. Obama spoke about taxes and values to the packed audience, comparing his tax plan to politcal rival, John McCain's policy.