US Secretary of State John Kerry expressed Tuesday his country's full support for Tunisia during its transitional phase.Kerry, during a meeting with President Moncef Marzouqi, praised capabilities of the Tunisian people to overcome difficulties accompanying the transition period to set an example for the entire region, a statement by the presidency said.Marzouqi said the Tunisians were keen on completing the democratic process, part of it was the adoption of a new constitution.He underlined the importance of boosting economic and trade relations with the US. Marzouqi and Kerry discussed means of strengthening Tunisian-American cooperation in all domains, particularly in the fight against terrorism and economic partnership.Kerry arrived in Tunis earlier otday on a short visit to the North African country.