How to congratulate a newly elected president of a foreign country as a career diplomat

'Your Excellency, Honorable President/Prime Minister [Prime Minister’s Name],

On behalf of the Government of [official name of the diplomat's country], I extend my warmest congratulations to you on your recent election victory.

Your success in the election is a clear indication that the people of [country name] have profound trust and confidence in your leadership. I am confident that under your guidance [country name] will continue to thrive and prosper, both domestically and on the international stage. 

Your victory marks a historic moment not only for the [country name] but also for the global community. As a close ally, [official name of the diplomat's country] looks forward to strengthening the bilateral relations between our two countries and working together on global issues of mutual concern.

[Official name of the diplomat's country] and the [Country name] share a long history of friendship and cooperation. Our relationship is deeply rooted in history, mutual trust, and common aspirations. I am confident that during your tenure, our two nations will strengthen bilateral ties for the mutual benefit of our peoples. 

We look forward to working closely with you to further strengthen the friendly relations and cooperation between our two countries.

Once again, congratulations on your well-deserved victory, and I wish you every success in your new role as the President/Prime Minister of [country name].