Only 18 states and the District of Columbia currently have an estate tax or inheritance tax. Minnesota, which is one of the states, recently voted to raise the state’s estate tax exemption, according to Forbes in "Minnesota Weakens Estate Tax Retroactive to January 1."
As part of a budget bill, the legislators included a gradual rise of the estate tax exemption in the state.
They had previously attempted to pass a budget that included raising the exemption to the federal estate tax level, but that budget was vetoed by the Democratic governor.
The new budget does not go quite that far in raising the exemption. However, the governor still has objections to it, which he expressed in a letter.
Nevertheless, he declined to veto the bill and signed it into law.
The governor is still asking the legislature to undo the exemption raise in an upcoming special session.
Reference: Forbes (May 31, 2017) "Minnesota Weakens Estate Tax Retroactive to January 1."