Sen. Rand Paul, R-Ky., sent a letter to his Senate colleagues Monday, urging them to vote against authorizing President Obama proposed military strike on Syria.

"The resolution to authorize force in Syria goes too far, and also not far enough, " Paul writes, "It does too much, but also too little."

Paul's letter makes the familiar libertarian case that bombing Syria will insert the United Staes into "a civil war in which there is no clearly defined American national security interest."

But Paul also argues that the the 90-day limitation for action in Syria also undermines American interests. "The resolution does too little by narrowly circumscribing the President's power to execute war," Paul writes.

"I disagree strongly with unlimited executive power to initiate war. But I have some sympathy for the argument that once war commences, the executive should not be hamstrung by a narrowed ability to execute that war."

You can read the entire letter below.