What was the Federal Estate Tax?

Prior to the Bush Tax Cuts?

After the Bush Tax Cuts?

Did the Obama Administration change the Federal Estate Tax?

Did the Trump Administration change the Federal Estate Tax?

Does the Biden Administration have any proposals?

Note: You can submit your answer as a Table; one row for each administration, pre-Bush would be Clinton, so like this:

Administration	Exemption level	Tax Rate	Years in Effect

Note: You may need to answer the Biden Administration portion in a sentence or two below the table.