Sign up for the daily Inside Washington email for exclusive US coverage and analysis sent to your inbox Get our free Inside Washington email Get our free Inside Washington email Jack White has mocked Donald Trump’s decision to add his own signature to all newly printed U.S. paper currency. The U.S. Treasury Department announced the unprecedented move last week, which is a first for a sitting president. In response to the news, the 50-year-old former White Stripes frontman wrote on Instagram: “Oh how humble! But why stop there donnie? Why don’t you use your small hands to sign into law that your oh so stern orange face appears on the front of the hundred dollar bill as well? “You might as well, since Congress and the American people (and to an extent, the rest of the world) are all just letting you do whatever you want to anyways, so go ahead!” White’s post continued with reference to the president’s recent threats to Cuba, with the musician writing: “Invade Cuba next? Sure! Go ahead, nobody’s stopping …