Gov. Sarah Palin (R-AK) will keynote the Republican campaign committees' top fundraiser in June, a sign of her enduring popularity with the Republican base and a signal that she has not foreclosed on the possibility of a run for president. The annual "Senate-House" dinner is scheduled for June 8 at the Washington Convention Center.  A joint release calls Palin "a breath of fresh air from the business-as-usual crowd."