Red state senators get brutal lesson that even they can't count on Trump

Disappointment, disdain, frustration, humiliation.

Any of these words could describe sentiment inside the camp of Bill Cassidy after President Donald Trump issued a surprise statement Saturday night in support of U.S. Rep. Julia Letlow in this fall’s U.S. Senate election in Louisiana.

One word that doesn’t apply: Surprise.

In the world of whim and petulance that Trump has created within the Republican Party, there should be no one close to Cassidy who was caught off guard when the president gave his endorsement to Letlow.