The US always has a contingency plan for critical issues, including within itself. The FBI has been capturing a lot of domestic terrorists and it's been in the news. So the point is, as the only true superpower in the globe, the US would ensure safety in case, for everyone, including itself and internal security is not taken lightly either as I've given an example.
But a contingency plan should not be accounted for open hostility or the other side becoming an enemy. Plus UPI is a paid source and very questionable.