The letter urges him to lead a strong delegation to the conference in Durban, South Africa, which starts on Aug. 31, and to give the conference more generous support than the $250,000 budgeted by the Clinton administration before it left office.
Norway sent a strong delegation with four participants able to win the event.
According to documents released from the ALEC State Chair for Florida, Rep. Jimmy Patronis, Florida lawmakers' attendance at ALEC's 2011 annual conference in New Orleans was "one of the strongest delegations in years".
Mr. Medvedev was supposed to come with a 500-strong delegation.
This week, a 24-strong delegation from Taiwan attended the annual conference in Mumbai of India's IT and outsourcing industries.
Five out of the UK's nine-strong delegation worked for big energy firms such as RWE, EDF and E.On.
The North has also said it will go ahead this week with a planned tour of the Kaesong Industrial Park by a 30-strong delegation of foreigners.
And it sent a 30-strong delegation to Qatar that was stacked with fisheries people who have years of experience with Cites.
But Terry Kramer, the head of America's 122-strong delegation, says that some of these hide attempts to facilitate or legitimise censorship of political speech.
26 February North Korea says it is willing to start direct talks with the US, as an eight-strong delegation heads south across the border.
