Removing Google Now results
As most of you know, IB Times and Christian Post are the absolute worst sources for Android news. They post completely fictitious rumors without any sources and without mentioning that the past 1010928 rumors they posted were wrong. I made the mistake of clicking on a few of these stories, so for a few months, I've gotten nearly daily notifications in Google Now about Nexus articles posted on these websites. I want to remove these websites from my Google Now completely.
I did some research on how to do this, and Google said to click the menu button on the individual notification inside of Google Now and I can request that no more results from that website be displayed. However, that's not a choice. Instead, I have the option of whether or not to continue to receive articles relevant to the Nexus devices. I do want to receive articles about Nexus devices, just not from these sources.
Can anyone tell me how to remove notifications from specific websites without removing notifications for the subject of the articles? Thanks in advance. Also, I wasn't sure if this went in Q&A or Apps & Themes, so I made a judgment call and went with the Q&A forum. Apologies if it should have gone elsewhere.
Nexus 7 (2013)