Johnson was the first impeached president, serving four years from 1865 until 1868.

The House impeached Johnson after he fired secretary of war Edwin Stanton and missed the two-thirds majority needed to be removed from office.

Andrew Nixon, George H.W. Bush also impeached and Donald Trump was the last to be impeached.

Among other US presidents, Johnson is the only one to be convicted.

The impeachment process is a long process and is a serious matter.

There are several stages, and a large number of people from different houses of government.

A staggering amount of press coverage is involved. Every newscast team and news reporters from around the world attend the proceedings.

This is how the United States became a republic. It is no surprise then that the process takes so long.