"We have an incompetent administration, and if I'm elected president, that will not change, I will tell you, that will not change over the next four years."He even emphasized his mistake with "I will tell you". Apparently he missed an important "not" in the text. As in: "We have an incompetent administration, and if I'm not elected president, that will not change . . . ." Whoever writes his speeches needs to leave complex syntax like "not elected . . . not change" out of Trump's speeches. Trump couldn't figure out the double negative.
You can see the mistake in context at about the 4:28 mark below:
This reminds of President Obama thanking himself. Though Obama is exceptionally good at teleprompter speeches and does appear to know what he is reading except for a few glitches like thanking himself. Obama actually looks at ease doing the tennis match swing back and forth and looks like he is talking to the audience. Trump looks like he's trying to find his place on the speech scroll.