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.
I think that maybe people are saying different answers because there might have been many such laws. I will mention one example: the Diversity Visa Immigration: it means that people from Eastern Europe have a higher change of obtaining a visa due to a smaller population in the US than the western European Countries.
They welcomed the Americans and fought alongside them.
The fourteenth Amendment provides equal protection for Americans. This means that no matter your age, race, gender, religion, etc, you will be treated equally by the government. Another one is immunity. This basically means that the states cannot take away certain rights we get from the Constitution. There are numerous rights the fourteenth Amendment give us and those are just two.
It promised to restore rule by reason to ltaly