It's a fine line between quixotic and committed, and just where Ron Paul falls is an open question as the Texas congressman pursues the 2008 Republican presidential nomination.The case for quixotic: It's a unique conceit to run as an anti-Iraq-war candidate in a generally pro-war party; to vow to eliminate myriad federal agencies, including the CIA, the IRS and the Federal Reserve; and to oppose every act of the federal government not specifically approved in the Constitution (including niceties such as congressional gold medals for such people as Mother Teresa, Rosa Parks and Pope John Paul II)."I've advocated over the...