Calif. Gov. Arnold Schwarzenegger is skeptical about mobilizing state National Guard troops to help secure the United States' southern boundary with Mexico.
"Going the direction of the National Guard, I think, is maybe not the right way to go," Schwarzenegger said.
As part of a proposed overhaul of the nation's immigration laws, President George W. Bush is considering plans to shore up the border.
The National Guard troops, who will man the border, are to be paid for by the federal government.
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The governor's positions on immigration are closely watched because the Austrian-born former movie star is the best-known immigrant in U.S. politics.
California has more illegal immigrants than any other state - an estimated 2.4 million.
Schwarzenegger has said he favors a temporary worker program but provided few details about how such a plan should work.
He does not support blanket amnesty but also thinks it is impractical to consider deporting millions of illegal immigrants.