It is hypocrisy at best.
The President of the USA which controls the Caribbean Sea as if it was its own inland lake, having invaded the Dominican Republic, Haiti, Grenada, and Panama within the recent past, which has been at war with Cuba for half a century, which has conquered the territories of Puerto Rico and the Virgin Islands, armed and trained counter-revolutionaries in Nicaragua and El Salvador, and supported military juntas in Guatemala and Honduras, has the audacity to say he is concerned that China uses its "sheer size and muscle" to push around smaller countries in the South China Sea. What? Give me a break. Not everybody have been lobotomized Mr. President. A few of us actually understand the sheer perversity of you uttering such nonsense.