Probably not, in this particular instance. Scotch can’t compete on price against US produced whiskies, its USP in America is quality. Those who choose Scotch in the USA are largely making a discerning choice for which they accept they will have to pay more. The majority of those who choose to pay more for (as they see it) a superior product will probably continue to do so, they will just grumble about it. There will undoubtedly be some impact, but talk of losing a lot of its market share is off the mark.