Why do you assume that Cruz has not read this legislation? It has been avaialble to Congress since 2012. As far as I know Ron Paul wasn’t voting and Rand Paul admitted he had not read the bill. Paul also said he might be for it later.
“Amanda Carpenter, the spokeswoman for Sen. Ted Cruz (R-TX) didn’t answer whether the Senator—who supports TPA, as he laid out in a Wall Street Journal op-ed with House Ways and Means Committee chairman Rep. Paul Ryan (R-WI)has read the text of the TPP deal either.”
Cruz also did not state in his explanation of why he voted for the bill that he read it.