Texas Rep. Steve Stockman's  decision to challenge Sen. John Cornyn in the GOP primary next year stunned the political world earlier this week. Now, there's only one question on peoples' minds: Could Stockman actually win this thing?

No, according to Evan Smith, the editor-in-chief of the Texas Tribune.

In an interview for Post TV, Smith said that Stockman ceiling in the primary is "between 20 and 25 percent", largely because even among tea partiers who helped propel Sen. Ted Cruz (R-Texas) to an upset win in a 2012 Senate primary, the House member is too extreme in his positions.

"He makes Cruz look mainstream," Smith said of Stockman. "He is on the outer edge of the outer edge."

For the complete interview with Evan, check out the video below.