The race to the presidency now turns toward the general election in November. CNN.com Live is your home for all the latest news and views from the campaign trail.
Today's programming highlights...
Continuing coverage: Tropical Storm Ernesto
9:25 am ET - Romney in Iowa - GOP presidential candidate Mitt Romney begins his day in Iowa, where he will participate in a campaign event in Des Moines.
10:30 am ET - Portman's Colorado tour - Sen. Rob Portman is an Ohio Republican that some say could be Mitt Romney's running mate. Portman makes the case for he and Romney when he visits a Romney campaign office in Johnstown, Colorado. He'll also visit Thornton at 12:45 pm ET, Lakewood at 3:00 pm ET and Denver at 5:55 pm ET.
1:00 pm ET - Mars rover briefing - NASA officials will again update the public on the current status of the Mars rover mission.
3:15 pm ET - Obama in Colorado - President Obama will also be heading to Colorado today to campaign. After speaking in Denver, he'll appear at an event in Grand Junction at 7:25 pm ET.
CNN.com Live is your home for breaking news as it happens.