Ray Dalio founded Bridgewater Associates.Reuters / Ruben SprichRay Dalio sees up to a 40% chance that political division in the US escalates into civil war.The hedge fund billionaire has repeatedly warned about US debt and internal and external conflicts.Dalio half-jokingly endorsed Taylor Swift for president, citing her ability to unite people.Ray Dalio warned the probability of a US civil war is as high as 40% — and said he might back Taylor Swift if she ran for president.