- Washington House passes 9.9% ‘millionaires tax’ as business leaders warn of ‘seismic shift’ GeekWire
- Washington State Passes ‘Millionaires’ Tax’ The New York Times
- WA income tax clears House after 24-hour debate The Seattle Times
- House approves ‘millionaires tax,’ bill heads to Senate for confirmation king5.com
- How some states are reviving a push to tax the rich PBS