2008 candidate with the slogan "Change we can believe in"

• First president whose name ends in a vowel other than E or Y
• Grammy-winning president
• Zero degrees needed to become president
• Former lecturer at the University of Chicago Law School
• "Dreams from My Father" author
• President who ended "don't ask, don't tell"
• President born on August 4, whose name can be found backward in 17-, 31-, 47- and 63-Across
• President born furthest from D.C
• U.S. president whose mother's first name was Stanley

Wiktionary Word definitions in Wiktionary
Etymology 1 a. Of or pertaining to the (l en political) (l en figure) and (l en current) (l en president) of the (l en United States of America) http://en.wikipedia.org/wiki/Barack%20Obama. n. 1 (surname African A=An lang=en from=Luo) 2 The (l en political) ...