And as for why it happened, I'm no expert on the Texas procedures, but what my friends there tell me is that the governor opposed a measure put forward by Democrats in the legislature to expand the number of children that would be covered. And instead directed the money toward a tax cut, a significant part of which went to wealthy interests.
The measure was supported by 32 democrats.
( z1 support :ARG0 ( z2 person :quant 32 :ARG0-of ( z3 have-org-role :ARG1 ( z4 political-party :name ( z5 name :op "Democratic" :op "Party" ) ) ) ) :ARG1 ( z6 measure ) )