U.S. Sen. Lindsey Graham, R-S.C., told Fox News Sunday today there’s a “91 percent chance” he’s going to run for the Republican presidential nomination next year.

Ninety-one percent chance. Not 90. Not 95. The odds are now at 91 percent.

http://www.huffingtonpost.com/2015/04/19/lindsey-graham-president-2016_n_7095360.html?ncid=fcbklnkushpmg00000063

Surely I’m not the only American wondering where the senator came up with 91 percent.

It’s usual for politicians to round these numbers off to the nearest zero or to the nearest 5. Isn’t that how it goes?

Sen. Graham, an Air Force reservist and lawyer when he’s not legislating in the U.S. Senate, must be from some school that suggests you should be as precise as possible when using numbers of any stripe.

I guess that includes numbers that set hypothetical odds on whether you’re running for president.

There’s also a 91 percent chance, therefore, that he’ll have to answer to critics within his own party that he’s too, um, “moderate” to suit their taste. He’s declared climate change to be the real thing and actually favors comprehensive immigration reform, according to the Huffington Post.

This might be the deal breaker among the hard-core GOP base: He’s actually endorsing some of President Obama’s Cabinet nominees and judicial appointees.

The chances of the hard right wing of his party forgiving him for those views? Zero.