The Democrat’s campaign said it would play ads in all 20 of Texas’ media market.
O’Rourke announced on Twitter last week his campaign raised $1,274,528 in a single weekend in response to attack ads by Cruz earlier this month.
Cruz’s ads criticized O’Rourke for being too extreme on a number of topics, from drugs, to abolishing Immigration and Customs Enforcement, to impeaching President Donald Trump.
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“We are going to continue running this campaign the right way — showing up in every community to listen to and learn from those we want to serve and represent, regardless of party or geography or any small differences that might otherwise divide us,” O’Rourke said in a statement.