Fill 'er Up

Your task: Fill the grid following the requirements listed below.

Across: Two of the Across entries must fit this clue:

• U.S. president with an incomplete second term, but not due to death

Down: Two of the Down entries must fit these clues: 

• The Family Circus cartoonist Keane
• Comfy shoe, briefly

Others: The remaining entries are all common words. 

The answer can be found HERE.