What is the fine-grained topic of the following text: A group of 114 House Democrats signed onto a letter calling on Senate to delay their vote on the confirmation of Judge Brett Kavanaugh to the Supreme Court until a "thorough investigation" is conducted into an allegation he committed an act of sexual assault decades ago. Only return the topic.
House Democrats calling for delay in Brett Kavanaugh's Supreme Court confirmation vote for investigation into sexual assault allegation.