What were the pressures on the united states government to push for expansion?

1. Free land

2. Mexico was not strong enough to hold back the American invaders.

3. Immigrants from Europe wanted land.

4. Population growth fueled the need for more land.  

5. The USA wanted to grow and become a more powerful and significant country at the expense of Mexico, Canada and the Indians.

Explanation:

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.

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