 One Democrat frequently mentioned as a replacement for Biden to head the ticket, Michigan Governor Gretchen Whitmer, ruled out running this year, even if the president steps aside. As Minnesota heads into a weekend heat wave, U of M medical experts reminding people to stay hydrated. Dr. Katie Loth says she understands drinking water can be a chore, but recommends pairing it with another habit that you already have. When you first brush your teeth in the morning, having a glass of water then, having one before each meal and snack that you drink, again in the evening.