What is the difference between apportionment and redistricting?
Apportionment is the process of determining the number of representatives to which each state is entitled in the U.S. House of Representatives based on the decennial census. By law, the apportionment results must be submitted to the President by December 31 of the census year. Redistricting is the process of revising the geographic boundaries of areas from which people elect representatives to the U.S. House of Representatives, a state legislature, a county or city council, a school board, etc. By law, redistricting data law must be submitted to the states by April 1 of the year after the census.
