Loose Front wheel

This past weekend, i was going 45mph down the street when i pulled up to a stop light, as i hit the brakes, my bronco began to shake. So I pulled over to see if one of the wheels was coming loose. Come to find, my front right wheel is a little loose, but for some reason it doesnt seem to tighten all the way. First i rotated the front wheels and the right side was still a little loose. Im not sure if it could be the rotor or hub assembly thats not lined up correctly and causing the wheel to not sit flush againts the rotor. Can anybody find a solution to this? Thanks for your help!

Need more info.let me try and run tru a few checks raise the right tire off the ground.grab the wheel top and bottom. push and pull.any play check for play at the ball joints. next garb the wheel on both side and push and pull. any paly check the steering pushing and steering box. next grab the wheel sides and push in pull out then spin the wheel listen rough noises besides the disc pad noise. If any play or rough noises need to change the wheel bearing.
next pull the wheel off and make sure the hub sits flush with the rotor. grab the rotor push and pull in and out. Need to check the brakes signs of a caliper stuck or going out will pull the bronco to the right or left when braking or shake the steering wheel.Hope this helps

Thanks bro, i'll run those checks today after work and i'll let you know what i find tomorrow morning. I know for a fact that my rotors are warped. I have new pads on right now, but the rotors need to be replaced. When i go to hit the brakes the brake pedal pulsates and causes my steering wheel to shake also. Im trying to think of what other problems i know the front end has to help you out. If i come across any, i'll post them. Thanks alot for your help. I hope we're able to find out whats wrong. I dont want to take it to a mechanic and get charged for BS. So i wanna figure it out on my own. Thanks