Below is an irregularly-updated list of the most common words  and n-grams found in the tweets, using the authorship classification from this site. Last update: Dec 5, 2017:

Most common words

     Mr. Trump   His Staff
1:  the         the 
2:  to          to 
3:  a           in 
4:  and         of 
5:  is          a 
6:  of          Trump 
7:  in          you 
8:  I           is 
9:  on          and 
10: be          on 
11: for         for 
12: you         I 
13: will        great 
14: it          will 
15: that        thank 
16: great       at 
17: are         with 
18: have        my 
19: at          be 
20: with        by

Most common bigrams (pairs of words)

Mr. Trump     His Staff
1:  will be       thank you
2:  of the        Donald Trump
3:  in the        of the 
4:  is a          will be
5:  a great       in the 
6:  thank you     to the
7:  for the       I will
8:  I will        a great
9:  to be         make America
10: to the        great again
11: it is         at the
12: on the        is a
13: I am          for the 
14: at the        America great
15: our country   on the 
16: he is         join me 
17: the USA       I am
18: is the        we will
19: going to      we are 
20: last night    to be

Most common trigrams (triplets of words)

     Mr. Trump                His Staff
1:  I will be                America great again
2:  America great again      make America great
3:  make America great       thank you for
4:  one of the               I will be
5:  think like a             join me in
6:  will be on               looking forward to
7:  will be interviewed      thank you to
8:  all of the               you for your
9:  art of the               will make America
10: of the deal              we will make
11: the United States        the United States
12: will be a                are going to
13: the art of               one of the
14: like a champion          Donald J. Trump
15: looking forward to       the White House
16: you have to              we are going
17: crooked Hillary Clinton  great honor to
18: be interviewed on        make America safe
19: a lot of                 will be interviewed
20: in order to              will be on