Barack Obama's critics appropriately have spotlighted his ties to William Ayers and Bernardine Dohrn, the remorseless co-founders and leaders of the terrorist Weather Underground. However, Obama's detractors largely overlook Ayers' campaign contribution to Obama.On April 2, 2001, Ayers donated $200 to Obama's Illinois State Senate re-election campaign. Though not a jackpot, this represents Ayers' only recorded political contribution.The Illinois State Board of Elections' online database shows that Ayers donated to no other candidate. The websites of the Federal Elections Commission, The Center for Responsive Politics (opensecrets.org), and NewsMeat.com indicate that Ayers has made no disclosed federal campaign contributions.Why is...