A judge put a hold on several questionable parts of the law, and just hours before it takes effect.
The most controversial parts of Arizona's new immigration law won't be enforced when the rest of the measure goes into effect on Thursday.
Federal District Judge Susan Bolton put a hold on the part of the law -- requiring a police officer to determine the immigration status of people they've detained for another reason and suspect are in the country illegally.
She also blocked the section requiring immigrants to carry their papers at all times.
And -- the part of the law that made it illegal for undocumented workers to solicit work in public places.
The judge's decision is at least a partial victory for the Obama administration. The Justice department was among the groups that sued to stop the law -- from being enforced.
Attorneys for the state of Arizona argued -- the law "is" constitutional. They say, their state is a common point of entry for illegal immigrants -- and, they have the right to protect their border.
They went a step further, saying -- the law would help federal immigration agents. And, it would cut the cost of jailing and providing healthcare -- for undocumented people arrested in the state.
The law has prompted large demonstrations from both supporters and opponents, most polls show a majority of those asked support it, but opponents have also taken to the streets.
Both sides are expected to demonstrate Thursday -- when the law goes on the books.
The state is likely to appeal Wednesday's ruling.
The governor calls the decision a "temporary bump in the road."