Who is the president of the united states? why is he/she important?

donald trump is the republican president of the united states. he is the 45th president. he's important because he is the leader of the u.s.   he decides how the laws of the united states are to be enforced and chooses officials and advisors to run the executive branch. the constitution makes the president commander in chief of the nation's armed forces. he is a very important person.

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.