By David Schwartz
PHOENIX (Reuters) - Arizona police can begin enforcing a controversial "show-your-papers" provision of a state law aimed at cracking on illegal immigration, which was upheld by the U.S. Supreme Court, after a federal judge lifted an injunction against the law on Tuesday.
U.S. District Judge Susan Bolton, in a written order, lifted an injunction blocking the measure, which requires police to check the immigration status of people they stop and suspect are in the country illegally.
The measure is part of a broad clamp-down on illegal immigration in the state signed into law in 2010 by Arizona's Republican Governor Jan Brewer, an outspoken critic of President Barack Obama's administration over federal policies on the issue.
In approving the law, Brewer had complained that the U.S. government failed to secure Arizona's border with Mexico.
"Today is the day we have awaited for more than two years," Brewer said in response to Bolton's ruling, adding that it was not enough to merely enforce the law.
"It must be enforced efficiently, effectively and in harmony with the Constitution and civil rights. I have full faith and confidence that Arizona's State and local law enforcement officers are prepared for this task," she said in a statement.
The measure requiring police immigration checks was one of several blocked by Bolton before the law took effect in July of 2010 and had been subject to repeated appeals by civil rights groups seeking to prevent it from going into force.
Obama's administration challenged the Arizona immigration law in court two years ago, saying the Constitution gives the federal government sole authority over immigration policy.
The U.S. Supreme Court upheld the "show-your-papers" measure in June but struck down three other provisions of the law.
Opponents of the law complained that it amounted to a mandate for racial profiling of Hispanics, who make up nearly a third of Arizona's 6.5 million people and urged the Obama administration on Tuesday to soften its impact.
"President Obama has the moral responsibility and legal authority to protect the people of Arizona," the National Day Laborer Organizing Network said in a statement.
"We expect he will do everything within his power to prevent the discrimination, punishment, and suffering that will escalate under ... (the law's) implementation," it added.
(Writing by Tim Gaynor; Editing by Peter Cooney and Christopher Wilson)