Former President Bill ClintonBill ClintonHouse lawmakers pitch ban on North Korean tourism GOP frustrated by slow pace of Trump staffing Bad intel from Russia influenced Comey's Clinton announcement: report MORE late Monday ribbed former President George W. Bush over the 43rd president's lack of a presence on Twitter.

Clinton used the hashtag #HowAreYouNotOnTwitter? in a Presidents Day message to Bush, President Obama and former Presidents George H.W. Bush and Jimmy Carter.

The message was retweeted by Obama's Twitter account.

Clinton was in Haiti with Clinton Foundation partners viewing agricultural and environmental projects.