Tyson Fury wants Donald Trump to be his guest of honor for his fight with Deontay Wilder in December ... officially extending the invite to POTUS through TMZ Sports!
"President Trump, I invite you to come down to see the biggest heavyweight fight in the last three decades!!!"
Of course ... Trump probably ain't showin' up -- security would be a nightmare -- but Tyson loves the dude, saying he's just as controversial!!
We also talked to Fury -- who was at Wild Card West boxing gym in L.