How has gerrymandering reduced the number of competitive disctricts in the United States?

Explanation:

The primary goals of gerrymandering are to maximize the effect of supporters' votes and to minimize the effect of opponents' votes. ... By "cracking" districts, a political party could maintain, or gain, legislative control by ensuring that the opposing party's voters are not the majority in specific districts.

the us hoped to prevent any nations from leaning towards soviet union-based communism. the containment policy was established in hopes of keeping communism from spreading to new places.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity