Democratic governors and lawmakers in a handful of high-income, high-tax states are promoting policies that are intended to spare their residents the pain of the new $10,000 cap on deductions for state and local taxes. Connecticut, New Jersey and New York are even planning to sue the federal government over the new cap, which was a key provision of the Republican tax overhaul adopted in December.

The legislative workarounds have moved swiftly through state Senate chambers in California and New Jersey. A bill with similar components passed the Oregon Senate and House in the last two weeks. The concept is under consideration in Connecticut, Maryland, New York, Rhode Island and the District of Columbia.

Proponents say the cap on state and local tax deductions disproportionately affects states controlled by Democrats and raises the cost of living. They say that has the potential to drive well-off residents to other states.