What percentage of the US population was living
in the West in 18702

At least 48%

Explanation:

if you don't feel sure then you can easily google it

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.