TALLAHASSEE - Republican presidential candidate Jeb Bush on Monday vowed to rein in federal spending and combat the "arrogance," ''sheer incompetence" and size of government if he's elected.In a speech aimed at President Barack Obama's administration as well as his rivals for the GOP nomination, Bush called for limiting new hires in government and extending the ban on former members of Congress from lobbying their colleagues from two years to six years.Bush also called for amending the U.S.