The two major possible explanations for the rise of party polarization in congress are " differences in political parties and redistricting."
This is because Congress members usually align with their political party's ideology and what they generally agreed to do before voting or debating in Congress.
Also, redistricting tends to cause party polarization because individual Congress members tend to follow what favors the districts they are representing by following their choice or the effect or changes they want or desire.
Party polarization in Congress arises from differences between Congress members upon which different Congress members stick to what they believe in or what would favor their districts or party generally.
There are other popular causes of party polarization in Congress. This includes the public's political ideology and the mass media.
Hence, in this case, it is concluded that party polarization is a common phenomenon among Congress members in the United States.
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