WASHINGTON - Democrats are using a House Judiciary Committee hearing on whether to impeach the IRS chief to attack Republican presidential candidate Donald Trump.

With IRS commissioner John Koskinen at the witness table, New York Rep. Jerrold Nadler asked if people under an IRS audit can release their tax returns. Koskinen said they can.

Trump has declined to release his tax returns, citing an audit.

Nadler asked if it's proper to use money from a charitable foundation for a portrait of themselves or to pay fees from legal disputes. Reports have said money from the Donald J. Trump Foundation has been used for those purposes.

Koskinen said generally, charitable money shouldn't be used to benefit someone who runs a charitable foundation. He declined to comment on specific details.