MEGHAN Markle’s sister Samantha has exclusively told The U.S. Sun she remains “optimistic” that her defamation lawsuit against the Duchess will go ahead. Wheelchair-bound Samantha, 58, appeared in the federal court in downtown Tampa, Florida, on Wednesday in a bid to stop her libel case against Meghan, 42, from being thrown out. 10 Meghan Markle's wheelchair-bound sister Samantha exclusively told The U.S. Sun that she was optimistic her defamation lawsuit against the Dutchess will go ahead Credit: MomandPapparazi for The US Sun 10 On Wednesday, Samantha chatted with reporters in Tampa, Florida, to give an update on the suit Credit:...