Did you read the article? The delay is procedural and the bill is coming back today.
I think that reason is smoke and mirrors... Proceedural... Right. I believe it boils down to lawmakers not wanting to be under the same rules as the average citizen. Just look at the supreme court ruling for the drug testing for political candidates as unconstitutional, but the average citizen cant get a "decent" job anywhere today without one... even government jobs like those lawmakers. IF this bill comes back with mandates for anyone accepting public funds to undergo drug tests, you can be your last dollar there will be severe limitations based on some bastardized version of "probable cause" required, and certainly it will not be a blanket requirement, requiring all of them to undergo drug testing to get on the ballot, be elected, take controll of the office, or to keep the office if already in office. After all they are a different class of citizen and not the average slave like you and I.
I have my own problems with the drug war, but thats here nor there. Whats needed is consistency with everyone treated equally under the law. Not different rules and laws depending on your class or job description.