Why settle for 3/5ths when you can shoot for zero?
Rep. Candice Miller is calling for a new constitutional amendment. Her proposal would limit the census to count only citizens of the United States. The result would change Section 2 of the 14th Amendment, which currently doles out House seats on the basis of "the whole number of persons in each state". The end result would be a major re-apportionment of seats in the House of Representatives and votes in the electoral college, with CA as the biggest loser. You may recall that a similar debate over who gets counted caused a bit of a stir back in the 18th and 19th centuries.