Sarah Vine echoed Ms Griffiths’ remarks, calling the trip a royal tour in all but name.
The Mail columnist claimed the couple were “having their cake and eating it” by picking “pick and choose” their quasi-royal duties.
Duncan Larcombe, a biographer of Harry, said the visit is a “calculated provocation on their part”.
He told the Daily Beast: “To the casual observer, especially overseas and even more especially in America, this will look like Harry and Meghan are back doing royal jobs, especially given that one of the gigs Harry is doing is the WellChild awards for sick children, which he always used to do when he actually was a working royal.
“It will be incredibly high-profile.