What worries me about GS is her tendency to latch onto whatever the public deems as the "Latest Thing," and then run with it non-stop, (e.g., Beth & her daughter Natalee Holloway.)
Also, I've read in years past that her husband is a staunch Dem who has contributed lots & lots of financial support.
There are earlier FR threads about GS which contain all the particulars.
Have you watched her lately? She moved far beyond the latest missing person stories long ago.
She and her husband supported Hillary, but Greta seemed to become close to Palin during the campaign. At any rate, if she is a staunch Dem, she is certainly able to put aside her views to conduct fair interviews.