Limbaugh fill-in Davis tells caller his conspiracy theory about Obama prolonging leak is “thoroughly rational analysis” Written by Media Matters Staff Published 06/08/10 3:15 PM EDT From the June 8 edition of Premiere Radio Networks' The Rush Limbaugh Show: Video file Previously: Rush's conspiracy theory: “Environmentalist whackos” may have blown up oil rig to “head off more oil drilling” Rush: “Jury's still out” on whether it's a “coincidence” that an oil rig expoded just before Earth Day Limbaugh conspiracy: Says “you're right” to caller's theory that Obama is jumping for joy over oil spill Conspiracy theorist Limbaugh: “I think it's tragic we have a president who could inspire” conspiracy theories on oil leak