ANALYSIS/OPINION: There is an old saying that you can lead a horse to water, but you can’t make him drink. President Biden surely knows it by heart but doesn’t want to hear it now. By his reckoning, COVID-19 vaccine naysayers are like those stubborn beasts. As refuseniks, they must be made to stop snorting at his medicinal offensive. So long as the U.S. Constitution survives, though, government health policy must not be shoved down Americans’ throats, nor the vaccine into unwilling arms. The balky behavior on the part of some individuals is showing up in a downturn in the number of shots administered. The seven-day moving average of vaccine doses administered per day peaked at 3.2 million in early April and has fallen to about 370,000, according to the U.S. Centers for Disease Control and Prevention.