In addition, musicians with ties to the Republican party also play at the event. This is a political rally - most everybody in attendance supports the Republican party in one way or another, and the speakers/musicians are staunch supporters of the party.
Your nephrons filter these substances out of your blood and then reabsorb some of them back into your blood. This keeps your blood composition constant. Excess water and waste products are then secreted as urine. Your kidneys vary the amount of a substance that is reabsorbed into the blood or secreted as urine.
After drinking too much water, that water gets absorbed into your blood. Without the rapid adjustment by your kidneys, that water would make your blood dilute. The average volume of blood water is about 3 liters (about 4/5 of a gallon). If you rapidly drink a gallon of water, that water gets absorbed into your blood. However, all that water does not stay in your blood vessels.