Why might isolationism lead to ethnocentrism?

Taking into account that ethnocentrism defines the tendency to consider culture itself as the only valid criterion for interpreting or valuing the behaviors, customs, traditions or values of other groups, ethnic groups or societies, we can affirm that this is a direct cause of isolationism , since this leads to an encroachment of the nations themselves and the almost zero interaction with the international sphere.

question 1:

senate and house of representatives

i would try to answer the second question but i’m not 100% positive but i hope i

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.