Word that sounds like dumpou or trumpou
Trump sounds like Trump. Many Chinese speakers whose English is not so hot will say 'ah' or 'oh' after English words, like: goodah, coldah.

This is the character for 啊 a, this is 哦 o. They are often added at the end of sentences for reasons of prosody.

You can say: 对 dui, meaning 'correct', but mostly you will hear 对阿 dui a 'correct'

Maybe he is making a (political) joke:
What's your name?
Trumpoh!