How did the Mexican cession affect politics in the United States?

The ancient system of trade routes that ran from rome to china was known as the

Why is it useful for historians to base certain studies on the analysis of historical periods

The impeachment of president clinton by the u.s. house of representatives occurred with a. virtually all republicans supporting it, while virtually all democrats opposed it b. about two-thirds of republicans supporting it and about two-thirds of democrats opposing it c. half of all democrats and half of all republicans supporting it, while half of all democrats and half of all republicans opposed it d. virtually all democrats supporting it, while virtually all republicans opposed it