From the Document: "On January 12, 2022, Senator Harry M. Reid [hyperlink], who died on December 28, 2021, is to lie in state in the Rotunda of the U.S. Capitol. Traditionally an honor bestowed upon American political and military leaders, 36 individuals (not including Senator Reid) have lain in state or honor [hyperlink] in the Capitol Rotunda. Additionally, unknown soldiers [hyperlink] from World War I, World War II, the Korean War, and the Vietnam era have also lain in state in the Rotunda. Supreme Court Associate Justice Ruth Bader Ginsburg and Representative Elijah Cummings have lain in state in National Statuary Hall [hyperlink]. Individuals who served as government officials (e.g., Member of Congress, President, Vice President) and as military leaders have traditionally lain in state, while private citizens have lain in honor. The most recent individual to lie in state was Senator Robert Dole [hyperlink] on December 9, 2021. The most recent individual to lie in honor was United States Capitol Police Officer William 'Billy' F. Evans on April 13, 2021. Prior to Senator Reid lying in state, 14 Senators have received that honor [hyperlink][.]"
CRS Insight, IN10961
Congressional Research Service: https://crsreports.congress.gov/