One factor contributing to the two-party system in the United States is the single-member district system of electing Representatives.

导致美国两党制的一个原因是，每个国会议员选区只能选出一名代表。

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Doubters know that the state-by-state, district-by-district system by which we elect the House distributes the vote to protect incumbents.

NPR: What Would It Take To Flip the House?

Israel would have to consider its electoral laws and weigh the prospect of moving from a proportional representation system to a direct, district system.

CENTERFORSECURITYPOLICY: Israel's Only Two Options

From 2001 to 2006, bills proposing adoption of the district system were introduced in many states, but failed to pass, according to the NCSL website.

CNN: Some GOP-led states look at electoral vote changes