The courts shot it down,
My take is that Wilson was embarrassed by the initiative but had to support it to get re-elected in 1994. Once elected he wanted nothing to do with it.
This is similar to Jan Brewer of Arizona who supported SB1070 only because she knew she could not get the Republican nomination after replacing Butch Napolitano as Governor midterm. Once elected she turned out to be turncoat RINO who forced through the Obamacare medicaid expansion that will cost the AZ taxpayers billions with the votes of the RATS and a few turncoat Republicans.