The disintegration of the Abbasid state resulted in the emergence of more different Islamic states controlled by Turkic peoples.
Explanation:
After the overthrone of the Umayyad by Abbasids arround 750CE, there was a disintegration of the Abbasid state, which was regarded as the third caliphate that succeedef the Islamic prophet. this disintegration was facilitated as a result of activities such as heavy taxation as well as agrarian disorder and others.
and there was evolvement numerous Islamic states that are been governed by Turkic peoples. Among the states evolved are Delhi Sultanate of India as well as Mamluk Sultanate of Egypt and others all governed by Turkish people
The answer is: to act as a ceremonial role within the Senate.
The phrase 'Pro Tempore' is a latin language with the meaning of 'for the time being'. President pro tempore of the senate only elected as a ceremonial role when the actual presiding officer of the senates is unable to attend the meeting/conference.