Possible Clues:

• President Martin Van --
• Martin Van __
• Van trailer?
• President Martin Van —
• End of a three-word U.S. president name
• Martin Van --
• Jackson successor Van __
• Part of a U.S. president's name that's Dutch for 'neighbors'
• Columnist Abigail Van __
• Raeburn van __, cartoonist who drew "Abbie an' Slats"