Kevlar only stops very low power rounds and shrapnel. A typical rifle round is much more powerful and will go through too many layers of kevlar for a vest made entirely of kevlar to be effective and practical against that. For that you need ballistic plates that are designed to shatter on impact, absorbing the bullet and its splash and dissipating its energy in the process.
The total can probably weigh something around 30 lbs for something Trump-sized and can stop a typical rifle round. But the worst is that this stuff isn’t flexible or breathable. It’s hot and sweaty, chafes your skin, hugs your chest tight and you are sandwiched between two rigid and heavy plates. The front one goes way up to the base of your neck and can press against your throat when you’re sitting down and slouch, which Trump does. It’s a miserable thing to be wearing all day.
Or Conan O’Brien’s Dr. Arroyo