The Illinois Senator makes the announcement Thursday morning in a video sent out to his supporters. Land of Lincolner reverses signed pledge to stay in public system.
Watch the video here and read script here.
McCain camp, RNC and Obama statements here.
Obama is expected to raise more than $200-$300 million, outspend McCain's public financing by as much as 3-1. He will likely break presidential campaign spending records in all or most states.
