What is a summary judgment ?

A motion for summary judgment (sometimes called an “MSJ”) is a request for the court to rule that the other party has no case, because there are no facts at issue. The party making the motion is claiming that either the case should not go before a jury at all, or a jury could only rule in favor of the moving party.

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.