Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
The latest news and analysis on the crisis in Ukraine.
(CNN) - Texas congressman Steve Stockman, a tea party favorite, just threw his hat in the ring for next year's Senate race, in a primary challenge against fellow Texan, and incumbent, Senator John Cornyn.
Cornyn is a member of the Senate Republican leadership, who has been ranked as one of the more conservative members of the Senate.
It's gearing up to be a showdown in the lone star state, and perhaps another warning shot for the Republican establishment.
CNN political commentator and The New York Times columnist Ross Douthat, Democratic strategist and former senior adviser to the Hillary Clinton campaign Kiki McLean, and White House correspondent for Yahoo News Olivier Knox discuss.