The spokesman said Mitt.ly, a personalized URL shortener which links to Romney's Free & Strong America PAC, will likely be replaced with Mitt.tt.
The .tt domain is based in Trinidad and Tobago, a Caribbean archipelago.
The .ly extension, popular with URL shorteners like bit.ly, is hosted by Libya. Earlier today, two bloggers announced their "sex-positive" shortening service, vb.ly, was shut down. The bloggers had created the service in order to allow sexual, adult and NSFW links to be shortened -- something the bigger services, like bit.ly, prohibit.
The Libyan government also prohibits adult content, and shut down the site, saying it violated "Islamic morality."