2007 Ford Focus excessive Shaking

You may need to have the front end alignment checked?

You might jack-up the tires, one at a time, shake the tire up and down and in and out, run your hand around the thread see if you feel anything? Put the vehicle on level ground, set the e-brake, block the wheels, to jack-up the tire, be safe.

Just a thought, you might rotate the front tires to the rear, see if it makes any difference