Sen. Rand Paul (R-Ky.) will deliver a "tea party response" to President Obama's State of the Union address on behalf of the organization Tea Party Express.


Rand Paul will respond to Obama's State of the Union. (AP Photo)

The speech pits Paul against Sen. Marco Rubio of Florida, who will deliver the official Republican response to Obama's speech Tuesday night. Both Paul and Rubio are considered likely presidential contenders in 2012.