Not significantly affected. All stations are off by about 15% in ratings (share only measures the percentage of radio users) and news stations are up a bit... but radio is mostly being used as an escape now that the news everyday is about 99% the same as yesterday.
I told elsewhere this story...
Back many years in Puerto Rico I managed and programmed an all-music station that had a 33.5 share in a 30 station market. A two-week ratings period happened to coincide with a hurricane... a fairly severe one. I decided to go all-out to cover it. When the book came out, we lost 20 shares. The all news stations (there were 4 of them at the time) all went up.
I realized that people knew where to go to get solid, reputable news. It wasn't my operation. We should have kept the format intact.
At another station, later, I made contact with an independent TV operation that had the #1 news department (headed by a former morning talent who started with me...) and got them to provide 45" updates every half hour. That ended up keeping listeners informed while staying in the format.
I think of that when I see so many stations trying to do something they are not known for and which they have no experience in doing.
There is a famous Spanish language saying, "Shoemaker, keep to your shoes" that tells us to focus on what we know how to do.