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Amazon is now automatically playing fullscreen video ads on Fire TV
(9to5google.com)
This is a most excellent place for technology news and articles.
https://play.google.com/store/apps/details?id=com.sunlightlabs.android.congress
Edit: If that app does not work for you, then I'd suggest the govtrack.us web site.
I can see why a lot of people wouldn't use that. I found two other apps, one of which was riddled with ads and one of which was paid. It's hard to complain about people not doing something when there's no practical and free way
If it doesn't work for you, there are alternatives to an Android app to get the same information, via the web.
If you are a programmer, the API being used is from ProPublica.