WASHINGTON (AP) -- The White House says President Barack Obama will join other Americans in getting health coverage through new purchasing marketplaces established by his health overhaul law. The so-called "exchanges" won't be up and running until 2014, so Obama's participation as president will depend on his getting re-elected in 2012. The White House announced Obama's planned participation in a statement Wednesday after Republican Sen. Charles Grassley of Iowa introduced an amendment that would have required Obama to go into the exchanges.