Senator Ted Cruz is proposing legislation that, if passed, would keep kids from being separated from their parents at the border while their parents await asylum hearings. There is bipartisan support to do this. The President has told Congress it must act if it wants to stop this. There is no reason to complicate matters.
Ted Cruz's legislation is reasonable and restrained in scope. It would only keep parents and kids together. It would not do other things that can be left for more comprehensive bills.