opposes tariff of 1816, [316];

sustains Adams, [339];

debate with Hayne, [355], [356];

his theory of the Constitution, [356];

leader of Whig party, [368];

in Tyler’s Cabinet, [372];

secures Ashburton treaty, [372];

opposes Mexican War, [379];

supports Compromise of 1850, [395];

his “Seventh of March speech,” [395];