Mitt Romney has been the Republican Party's presumptive nominee since April, but the 2012 presidential field is still more crowded than you might think: More than 400 candidates have filed statements of candidacy with the Federal Election Commission. You've probably heard of some of them, like comedian Roseanne Barr, Quran-burning pastor Terry Jones, and anti-abortion activist Randall Terry. But you probably haven't heard of these wacky would-be presidents:

Lester Byerley, hydrogen peroxide drinker

Lester Byerley MySpaceLester Byerley MySpaceA fan of FDR who nevertheless filed as a Tea Party candidate, Byerley warns that Obamacare will "put people in jail for not buying insurance." He recommends regularly consuming hydrogen peroxide to cure cancers, colds, and other viruses. By reducing the need for doctors and hospitals, Byerley's cure-all would kill jobs, he conceded to the Philadelphia Weekly. "But human health should supercede everything, including the economy." Byerley also said that as president he would "hand out Federal Reserve debit cards to anyone earning under $50,000 a year, and it'll start off with $12,000."

Warren Ashe, Time Traveler

While working for the Reagan administration, Ashe claims, he developed a "program of time travel communications" that reached out "at least and no less than 500 years into the future." He says he has transported sperm and DNA into the 24th century and has built flying saucers "that are capable of going to another solar system at high warp speed." Ashe, a Democrat who has done stints in the Air Force, Army, and Navy, and owns the Jyperonix Astrophysics company, has been running for president since 2000. His hobbies include computers, pool, tennis, listening to "Snoops Dog," and "inventing electromagnetic hover devices."

Laurie Roth, Birther radio host

Laurie Roth laurieroth2012.com Known as the "Annie Oakley of the airwaves," Roth has been a right-wing radio host for the past decade. One of several birthers to enter the presidential fray, she was a plaintiff in one of Birther Queen Orly Taitz's frivolous lawsuits challenging President Obama's eligibility. But, Roth insisted, "I am not running for President as a gimmick to simply get me the standing to be able to sue Obama." As president, she would strike down the National Defense Authorization Act and Obamacare since they violate the Constitution, outlaw all abortions, eliminate nearly all federal taxes, and wage war on radical Islam (PDF).