This is a play on words. Specifically these words: "wine" and "sour grapes".
President Trump tweets a whole lot of meritless complaints about petty disputes concerning almost everything that displeases him. Some would agree his whine is made with sour gripes.
This tag for Arnold Schwarzenegger actually was coined by Steve Lopez, a writer for the Los Angeles Times, in a column the day after the recall election that installed Arnold as governor, in spite of his acknowledged history of breast and booty grabbing (or, as Arnold described it, "being playful"). Garry Trudeau made Lopez's term nationally famous in the "Doonesbury" cartoons. It's a pun on a German term for a group leader, "gruppenfuhrer."