Oliver's immigration status placed certain constraints on what he could do in his adopted country, but also provided him with comedy material as he poked fun at the opacity and occasional absurdity of the process of obtaining US residency. Oliver was one of the many writers on the picket lines during the Writers' Guild strike, which brought "The Daily Show" to a halt; he appeared on the show upon its resuming production on 7 January 2008. During a sketch, he pointed out that he was then in America on a visitors' visa that requires him not to strike while the show is in production, as violation of the terms of the visa would be grounds for deportation. When asked about his residency status in early 2009, Oliver said, "It's an ongoing, and slightly unsettling, battle to be honest. I tried engraving 'Give me your tired, your poor, and your aspiring comic performers' into the base of the Statue of Liberty, but apparently that's not legally binding."