WASHINGTON (CNN)—Arizona Senator John McCain is adopting a major 2008 campaign slogan for a new political action committee designed to support not only his own planned re-election run in two years, but help him put his stamp on the rebuilding of the Republican Party. The formation of the “Country First” PAC is to be announced Wednesday, two sources familiar with the plans tell CNN. One of the sources called it the “first official step” of the GOP Senator’s re-election campaign. McCain made it clear not long after losing the presidential election that he intended to seek re-election to the Senate...