what is reapportionment and when does it take place
Apportionment (politics) 2 U.S.C. § 2a, based on the Reapportionment Act of 1929, reapportions the Representatives to the states following each decennial census. It left the states to decide how and whether to redistrict, except in the case that the census changes the state's number of Representatives, but federal court cases now require states to redistrict based on each census.