The Republican and Democratic parties must choose whom they'll support in the election.

共和党和民主党必须选择在选举中将支持谁。

Caucuses often help choose delegates for the national conventions that will happen for both Republican and Democratic parties next summer.

党团会议通常有助于为明年夏天的共和党和民主党全国代表大会选择代表。

The new U.S.-Japan Caucus has members from the both Democratic and Republican parties.

新的美日核心小组成员来自民主党和共和党。

Basically speaking, nowadays, no one now living in the United States can remember when the contest began between the Democratic and Republican parties.

基本上来说，现在生活在美国的人已经不记得民主党和共和党的较量是从什么时候开始的了。