Answer:
In legislative procedure, a rider is an additional provision added to a bill or other measure under the consideration by a legislature, having little connection with the subject matter of the bill. Some scholars identify riders as a specific form of logrolling, or as implicit logrolling.
Explanation:
The USSR extended its sphere of influence into Yugoslavia and Albania by supporting the communist parties in those countries. Yugoslavia separated from the USSR later on after a fight between those who supported the USSR way of Communism, that is Stalin, and those who supported the socialistic way, that is Tito.
I believe you meant the red scare"" ... it was mass hysteria scare over the spread of communism in the US and the rest of the world
