Washington State Governor Bob Ferguson has officially signed a historic income tax on millionaires into law, projected to bring over $3 billion in revenue. This new tax, targeting incomes above $1 million at a rate of 9.9%, has prompted immediate legal challenges, with former Attorney General Rob McKenna preparing a lawsuit against its constitutionality. The tax is designed to address income inequality, with supporters claiming it will help rebalance an unfair system that benefited the wealthy, especially after recent federal tax cuts. However, opponents argue it is unconstitutional and could negatively affect small businesses, as well as create ripple effects in the housing market, evidenced by a significant increase in high-value home listings post-enactment. The political landscape remains tense as Washington Democrats push forward with this initiative, while legal and political battles loom on the horizon.