Here is Dr. Rick Bright's full statement, just emailed out by the law firm Katz, Marshall & Banks which will be representing him as he files a whistleblower complaint.
(First reported by @maggieNYT)

His attorneys Debra Katz & Lisa Banks make clear in an addendum statement:
"The Administration’s removal of Dr. Bright from his position as director of BARDA is retaliation plain and simple."