Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
I don't have the service but I believe you can sign up for Fox Nation and watch via Roku. Fox Nation gives you access to the live Fox News feed and some original programming (featuring some of the fox news personalities) Fox Nation also lets you stream most of the fox news schedule once a program has aired for the day.
I think it is like $ 6.00 a month for the monthly plan and a bit less if you sign up for a year.
I am pretty sure it has some kind of free trial period, so you can check it out before you decide to actually pay for the service.