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Michael Thomas, Associated Press
Republican presidential hopeful Texas Gov. Rick Perry gives his wife Anita a kiss during a "Welcome Home Rally" at Abel's on the Lake Saturday, Aug. 20, 2011, in Austin, Texas.

WASHINGTON — Experts say Texas would be among the biggest beneficiaries of President Barack Obama's health care overhaul. The state stands to gain coverage for nearly 4 million uninsured residents.

But Gov. Rick Perry opposes the health law, and he's blocked moves to lay the groundwork for expanding coverage.

It's not clear what he would put in its place. Among the alternatives he's supported is an untested regional solution.

With Perry running for the Republican presidential nomination, health care in Texas and his own ideas as governor will be scrutinized on the national stage.

Texas boasts world-renowned facilities such as the MD Anderson Cancer Center in Houston. Texas also has the highest proportion of uninsured residents of any state — 26 percent.