Missouri's push for statehood threatened to upset the balance of power between

The correct answer is that Missouri's push for statehood threatened to upset the balance between slave states and free states.

Missouri's desire to entire the Union and on what side prompted the question of how to handle new states as they enter and the delicate balance between the two sides.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

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.