Kennedy was grilled on vaccine availability, his staffing shakeups at the CDC. Several Republicans expressed concern on vaccines, while Democrats accused Kennedy of breaking pledges. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7 coverage of