Ida Saxton McKinley

Ida Saxton McKinley was the wife of William McKinley.

History
When Homer looked at a collection of pine cones featuring the first ladies he asked Marge where Abigail Adams was before he found her. He then asked her where Mary Todd Lincoln was, before finding her. He then asked about Ida Saxton McKinley before he found her, and then he was going to ask about one more but Bart started to talk with him so he stopped searching for the ladies.