Representative Kevin Hern announced a run for the soon-to-be vacant Senate seat in Oklahoma.Hern made the announcement on social media on March 11th.Sen. Markwayne Mullin is awaiting confirmation to lead the Department of Human Services, freeing up that Senate seat.2 News Oklahoma reached out to Hern's office for a comment, but hasn't heard back.DOWNLOAD the 2 News app for push alerts on any developments. Stay in touch with us anytime, anywhere -- 2 News Oklahoma on your schedule | Download on your TV, watch for free. How to watch on your streaming device Download our free app for Apple, Android and Kindle devices. Like us on Facebook Follow us on Instagram Watch LIVE 24/7 on YouTube ...read more read less