Conversation so far:
What happened in the accident?
On May 4, 2006, Kennedy crashed his automobile into a barricade on Capitol Hill in Washington, D.C., at 2:45 a.m.
Did he have any passengers?
Capitol Police official said the congressman had appeared intoxicated when he crashed his car.
Are there any other interesting aspects about this article?
On May 5, 2006, Kennedy admitted publicly that he had an addiction to prescription medication.
Did he go to rehab?
On June 12, 2009, Kennedy announced that he had again entered rehab.
When did he first go to rehab?
CANNOTANSWER.

Question: Did this affect his political career?
Self-contained rewrite: Did Kennedy's accident and rehab affect Kennedy's political career?