Public Policy Polling’s latest shows that, in signing the immigration bill, Arizona governor Janice Brewer has shored up her support among Republicans in a difficult reelection bid against Democrat Terry Goddard:

In the most likely match up for this fall Goddard leads Brewer 47-44. That represents a tightening since Goddard held a 46-36 lead over her last fall. Partisan preferences have hardened in the wake of Brewer’s signing a tough immigration bill last week. Where Brewer was getting only 59% of the Republican vote in our last poll, she’s now at 73%. But Goddard has seen a similar improvement in his own party, improving from 77% of the Democratic vote to 88%. The main reason for the overall tightening is that where Brewer trailed Goddard by 12 points with independents previously, that’s now just a 2 point deficit.

But Brewer has also suffered sizable losses among hispanic voters:

There has been a great deal of movement along racial lines. In the September poll Goddard had a 3 point lead with white voters, but he now trails Brewer by 8. At the same time he’s increased his lead with Hispanic voters from 20 points to 46. There are a lot more white voters in the state than Hispanic ones so from a cynical, purely political perspective Brewer’s actions last week probably did her some good.