(CNN) - Joe Biden is adamant his son's decision against a bid for the Delaware Senate seat held by the vice president for nearly four decades had nothing to do with the current political climate.
"He would have been a strong candidate. But honest to God, that's not the reason he didn't run," Biden said on NBC's The Today Show when asked if the Democratic Party's misfortune in a string of recent elections led to his son Beau's decision.
"He didn't run because he has one of the largest pedophile cases I suspect at least in the history of the state of Delaware," Biden also said of his son who currently serves as Delaware's attorney general. "He realizes…his responsibility is to do his job as attorney general. "
The younger Biden announced his decision earlier this week in what was a blow to the Democratic Party which now finds itself without a strong candidate to challenge the likely Republican nominee, Rep. Mike Castle, the former 2-term governor of Delaware.
"I cannot and will not run for the United States Senate in 2010," Beau Biden said in an e-mail to supporters Monday. "I will run for re-election as Attorney General."
Biden's seat is currently held by Ted Kaufman, who was named as an interim replacement for Joe Biden when he stepped down from the Senate after his election in November 2008 as vice president. Kaufman has also said he will not run for the seat.