Analysis of information sources in references of the Wikipedia article "House Democratic Caucus" in Simple English language version.
Rule 1. Caucus Membership A. All Members of the House of Representatives, the Resident Commissioner from Puerto Rico, and the Delegates from American Samoa, the District of Columbia, Guam, the Northern Mariana Islands, and the Virgin Islands who are Members of the Democratic Party shall be prima facie Members of the Democratic Caucus of the House of Representatives.
