Are Performers' Record Labels To Blame For Donald Trump's Miserable Inauguration Lineup?!

It's official now that Toby Keith and Three Doors Down have booked themselves gigs performing at Donald Trump's inauguration (uh... congrats?), but there just aren't that many other performers willing to step up for the Prez-elect!
And after Jennifer Holliday very publicly backed off in an open letter published earlier today... is something deeper going on here??
Related: Howie Mandel Calls Bullsh*t On Trump's Golden Shower Excuse!
The Donald isn't exactly popular -- and he's been controversial