In the original novel, the lead character is Minami Kousuke, a reporter of Nihon Shinpo but the drama's setting will change the lead to Aoi Souta (Mikami) who is the president of the Japanese entity of United States' large-scale shopping company AMC. Aoi has some traits in his character which are said to remind people of President Trump e.g. using extreme words to fan people's emotions and doing things in a dangerous manner. He will be the person aiming to take over his former employer Nihon Shinpo for his current employer AMC and behaves like a tyrant towards the people who work with him.
The author Douba described Aoi as a very complicated person who has many sides in his character so he's very eager to see how Mikami will play this character in the drama. On the other hand, Mikami commented that Aoi is like Trump in certain ways e.g. his unwavering beliefs and vision and hopes to be able to show the persistence and passion in Aoi through his acting in this drama.
Sources: Oricon / Eiga.com