When silver prices rose relative to gold as a reaction to the California Gold Rush, silver coinage was worth more than face value, and rapidly flowed overseas for melting. Despite vocal opposition led by Tennessee Representative (and future president) Andrew Johnson, the precious metal content of smaller silver coins was reduced in 1853, allowing them to circulate. Until then, depositors of silver could choose to have their bullion struck into silver coins of any denomination of five cents or above; the Act of 1853 lightened the silver coins from the half dime to the half dollar and eliminated the right of the depositor to have silver struck into those denominations. Depositors could still choose to have silver struck into dollar coins, but since there was more than a dollar's worth of silver in a dollar coin, it was more profitable to sell the bullion to manufacturers and jewelers. So long as silver prices remained high, this effectively placed the United States on the gold standard.