Churchill didn't say this, but we wish he had,

Snopes  "On 7 August 2018, Texas governor Greg Abbott posted a 9gag.com-branded meme on Twitter which included a statement attributed to former British prime minister Sir Winston Churchill about how “fascists of the future will call themselves anti-fascists”:" . . .

. . . So who does deserve credit?

"Similar quotes positing the idea that fascism would come to America disguised by a different name can be traced at least as far back as 1936 (although they weren’t attached to Churchill’s name until decades later). On 18 March 1936, for example, the Cincinnati Inquirer reported on words delivered by Norman Thomas, an American Presbyterian minister who was running for president as the Socialist Party of America’s candidate, at an informal luncheon: “Fascism is coming in the United States most probably, but it will not come under that name.' ”  . . .

. . . Apparently Churchill’s name was spuriously appended to this statement about fascism circa 2010 more than 40 years after his death (and with no supporting evidence).

"Timothy Riley of the National Churchill Museum told us that these words do not appear in any of the articles, speeches, or books penned by Churchill: “Winston Churchill authored over 15 million words — in articles, speeches, books and other writings. There is no evidence that the statesman wrote the words in question. It is impossible to know if he uttered the words in conversation, but I am not aware of any of Churchill’s contemporaries who recorded or recalled the statement.”

But Churchill did say all this: Winston Churchill Quotes About Socialism

I suggest President Trump hang this in the Oval Office: