Landolfi was a council member of Mondragone beginning in 1983.[1] He became a member of the Italian parliament in June 2001, being part of the National Alliance party.[2] In addition, Landolfi served as the spokesman of the AN.[3] He was a Member of the Chamber of Deputies from 1994 to 2013.[2] He served as the member of different parliamentary commissions.[2] He was appointed Minister of communications to the cabinet led by prime minister Silvio Berlusconi in a reshuffle on 23 April 2005, replacing another AN deputy Maurizio Gasparri in the post.[4][5] On 17 May 2006, Landolfi's term ended, and Paolo Gentiloni became the new minister of communications.[6]
Landolfi was appointed president of the state television watchdog, Commissione vigilanza, after leaving office in 2006.[7]