Will Jack Lew change his signature for U.S. currency?

With White House chief of staff Jack Lew on tap to be Treasury secretary, some in Washington wonder: Will his signature get an upgrade?

Lew's curlicue scribble -- which makes his name look like "Jack Loooooooo" -- is now trending on Twitter, and does have some significance for American wallets and pocketbooks.

After all, the Treasury secretary has his signature affixed to every U.S. currency bill.

So don't be surprised if Treasury chief Lew clarifies his John Hancock.