FACTBOX-President Obama's cabinet nominee problems

March 2 (Reuters) - President Barack Obama was hit by another embarrassment on Monday over one of his Cabinet nominees when it was revealed that his nominee to be U.S. trade representative, former Dallas Mayor Ron Kirk, also had tax problems.

The Senate Finance Committee said Kirk had filed amended tax returns after a review found he had failed to pay taxes on $37,750 in speaking fees he donated to his college alma mater.

The fees should have been reported as income and then deducted as a charitable contribution, the panel said.

Kirk also made adjustments to reduce the amount of business expenses he claimed for Dallas Mavericks basketball tickets and for tax and accounting fees and to reduce the amount of charitable contributions he claimed.

His total tax adjustment for three years spanning 2005, 2006 and 2007 would be approximately $9,975, the committee said.

More than a month since taking office, Obama has not yet filled three places in his 15-member Cabinet. His nominees for commerce and health secretaries have yet to be confirmed as well as the nominee for U.S. trade representative.

The Senate swiftly approved some nominees, such as Secretary of State Hillary Clinton, but others have run into trouble.

Here are the nominees who encountered problems:

* Republican Senator Judd Gregg withdrew from consideration on Feb. 12 citing political differences with the Democratic president. Gregg was Obama's second pick for commerce secretary after New Mexico Governor Bill Richardson withdrew in the face of a legal inquiry.