First letter i wrote:
Dear Senator XXX,
My name is yyy, i am ... .. bla bla bla.
2 weeks later, i received a letter from his assistant asking what i want to achieve.
I replied with:
my primary objective is to get an interiview with USCIS and get my greencard approved.
bla bla bla.....
done.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!