Hi Ray, 

Thanks for reaching out. The rapid growth of clover often indicates low nitrogen levels in your soil, and a dense and healthy lawn will be the best defense against clover. Proper fertilization and lawn care (https://extension.umn.edu/planting-and-growing-guides/lawn-care-calendar) should help. 

Here's an article with more information: https://extension.umn.edu/weeds/dutch-white-clover Make sure it's not yellow wood sorrel, which is frequently mistaken for clover: https://extension.umn.edu/weeds/yellow-wood-sorrel

Good luck!