As Twitchy reported, Sen. Rubio challenged senators to “step up” and keep their promises on Obamacare. Sen. Cruz has already joined the call to defund it.

Exactly. And Sen. Cruz is doing just that. He has taken to Twitter using the hashtag #DefundObamacare to further the fight. Sen. Cruz understands the power of Twitter; he recently read #StandwithRand tweets during Sen. Rand Paul’s epic filibuster.

Citizens answer his call.

Sen. Cruz is behind it. Who will be next? We are watching, senators.