‎I assume the president under extraordinary circumstances never before experienced by Americans
what does the sentence mean？[Image]

Question

Answer

There is an error. It should be:

'I assume the presidency'

In other words, Ford was taking on the role of president.

I actually saw him - I played in our High School band, which was chosen to play for an event he spoke at.

Answer

Hi

To assume the presidency- take over the role of President/ become President. 
Under extraordinary circumstances- not under normal circumstances 
Never before experienced by Americans- it is the first time American´s experienced these circumstances.

Kind regards
Nicci