Dallas, Texas (WFAA) -- Former first lady Barbara Bush is not mincing words.

Here's what she had to say about the mud-slinging in the presidential campaign.

"It's been I think the worst campaign I've ever seen in my life. I just hate it."

Mrs. Bush says the tone of the campaign has just been too ugly.

She made the comments Monday during a conference about first ladies at Southern Methodist University in Dallas.

Mrs. Bush has recorded some campaign phone messages for Mitt Romney, but says she hasn't officially endorsed anyone.