The presidency of john tyler is significant because he became president under the 25th amendment he was the first vice president to succeed to the presidency he established the order of presidential succession he was the first president to be impeached

Explanation:

John Tyler was the first vice president to assume the office of president at the death of the president. William Henry Harrison died shortly after becoming president and Tyler took over.

U.S. senator before being elected Vice President in 1840. He was the first to succeed to the office of President on the death of the incumbent, succeeding William Henry Harrison.

He was the first Vice President to succeed to the presidency is the right answer!

Explanation: