LUBBOCK, Texas—Dan Backer, the D.C. area attorney widely known for his work with TheTeaParty.net, has come forward as the one responsible for attacking Texas Attorney General candidate State Senator Ken Paxton in a massive half-million dollar Texas ad-buy. Ken Paxton is the Tea Party candidate who Senator Ted Cruz proudly honored. A media professional who works with TheTeaParty.net told Breitbart Texas that the group has no part in what their attorney is doing. Paxton’s opponent, the clear beneficiary of Backer’s ads, is Texas State Rep. Dan Branch. Branch is a former AFL-CIO union group lobbyist who previously introduced an amendment...