Joe the Plumber, who asked Barack Obama if he would raise his taxes on one of Obama's campaign stops, might related to Charles Keating, according to online rumors. Some blogs speculated he was related to Charles Keating's son-in-law, who he shares his last name with.The Guardian: Joe Roundup(October 16, 2008)

Charles Keating is a businessman and former banker who was convicted of fraud, conspiracy and several other charges in the 1990s. Several senators, including John McCain, were accused of attempting to interfere with the investigation of Keating.Herald-Leader: McCain blames financial turmoil on Wall Street... (September 17, 2008)

Charles Keating was the former head of Lincoln Savings and Loan Association, which filed for bankruptcy in 1989. Keating and the firm were targets of an investigation that found Keating guilty of conspiracy, fraud and several other charges. Keating was sentenced to prison. The failure of the Lincoln Savings and Loan cost the taxpayers over $2.6 billion. McCain, together with four other senators, was criticized for his involvement in the investigation. McCain were freed of the allegations, but was found to have exercised "poor judgment" by the Senate Ethics Committee.Herald-Leader: McCain blames financial turmoil on Wall Street... (September 17, 2008)