I don’t think Brown would be considered a “powerful” senator. Must be someone that’s been in place longer.
Also, Drudge says the Daily Caller is going to put this out - so it’s most likely about a DimRat Powerful Senator.
Dims up for re-election:
Daniel Akaka (Hawaii)*
Jeff Bingaman (New Mexico)*
Sherrod Brown (Ohio)
Maria Cantwell (Washington)
Benjamin Cardin (Maryland)
Thomas Carper (Delaware)
Robert Casey (Pennsylvania)
Kent Conrad (North Dakota)*
Diane Feinstein (California)
Amy Klobuchar (Minnesota)
Herb Kohl (Wisconsin)*
Joseph Lieberman (I-Connecticut)*
Joe Manchin (West Virginia)
Claire McCaskill (Missouri)
Robert Menendez (New Jersey)
Bill Nelson (Florida)
E. Benjamin Nelson (Nebraska)*
Bernard Sanders (I-Vermont)
Debbie Stabenow (Michigan)
Jon Tester (Montana)
Jim Webb (Virginia)*
Sheldon Whitehouse (Rhode Island)
* = not seeking reelection.
Highest likelihood: Bill Nelson (not real powerful). Very easy nonstop flights from Florida to Caribbean. Close senate race. Squeaky clean image.