Mr. President-elect:
it is with great pleasure to add my warmest congratulations on your election as the President of the United States of America.
I would like to ask if a native speaker finds the formulation "it is with great pleasure to add…" OK? Is the preposition "with" necessary? – And what about the article? Does not by chance the indefinite one miss before "great pleasure"?
Best Answer
It's neither grammatical nor pleasant-sounding.
The stock phrase is "It is with great pleasure that I verb ...".
"It is with great pleasure that I announce the winners...", "It is with great pleasure that I accept this award...", etc.
Your expression would be better worded as
Or alternatively