How did william h. seward aid us expansion?

Seward signed a treaty with Russia to buy Alaska

Explanation:

William Henry Seward was an American politician, the 12th governor of New York, United States Senator and Secretary of State of the United States during the administrations of Abraham Lincoln and Andrew Johnson. As Johnson's Secretary of State, he engineered the purchase of Alaskan Russia in 1867.

b) a state law could be declared illegal if it contradicted the constitution.

explanation:

the conflict of this case originated when james w. mcculloch, a cashier of the baltimore branch of the second bank of the united states that the congress had chartered in 1816, refused to pay a tax imposed by the maryland state.

in the case, the state of maryland appealed that the establishment of a second bank was unconstitutional since the constitution didn't say anything about granting that power to congress. however, the case determined that even if such right wasn't specifically stated in the constitution, it was part of the "implied powers" of the government enunciated in article i, section 8.

the case also eliminated maryland's legislation to impose taxes to a national bank, asserting that even though the states retained the power of taxation, the constitution's laws are supreme and can not be controlled by the states, therefore, if a state law contradicts the constitution, it should be declared illegal.

explanation:

d the wampanoag the pilgrims because the pilgrims protected them from their native americans foes.