CHICAGO (Reuters) - Less than 24 hours after the House of Representatives gave final approval to a sweeping overhaul of healthcare, attorneys general from several states on Monday said they will sue to block the plan on constitutional grounds.

Opponents of the proposed U.S. health care bill are pictured during a rally outside the U.S. Capitol Building in Washington, March 21, 2010. REUTERS/Jason Reed

Republican attorneys general in 11 states warned that lawsuits will be filed to stop the federal government overstepping its constitutional powers and usurping states’ sovereignty.

States are concerned the burden of providing healthcare will fall on them without enough federal support.

Ten of the attorneys general plan to band together in a collective lawsuit on behalf of Alabama, Florida, Nebraska, North Dakota, Pennsylvania, South Carolina, South Dakota, Texas, Utah and Washington.

“To protect all Texans’ constitutional rights, preserve the constitutional framework intended by our nation’s founders, and defend our state from further infringement by the federal government, the State of Texas and other states will legally challenge the federal health care legislation,” said Texas Attorney General Greg Abbott, in a statement.

The Republican attorney generals say the reforms infringe on state powers under the Constitution’s Bill of Rights.

Virginia Attorney General Kenneth Cuccinelli, who plans to file a lawsuit in federal court in Richmond, Virginia, said Congress lacks authority under its constitutional power to regulate interstate commerce to force people to buy insurance. The bill also conflicts with a state law that says Virginians cannot be required to buy insurance, he added.

“If a person decides not to buy health insurance, that person by definition is not engaging in commerce,” Cuccinelli said in recorded comments. “If you are not engaging in commerce, how can the federal government regulate you?”

In addition to the pending lawsuits, bills and resolutions have been introduced in at least 36 state legislatures seeking to limit or oppose various aspects of the reform plan through laws or state constitutional amendments, according to the National Conference of State Legislatures.

So far, only two states, Idaho and Virginia, have enacted laws, while an Arizona constitutional amendment is seeking voter approval on the November ballot. But the actual enactment of the bill by President Barack Obama could spur more movement on the measures by state lawmakers.

As is the case on the Congressional level, partisan politics is in play on the state level, where no anti-health care reform legislation has emerged in Democrat-dominated states like Illinois and New York, according to the NCSL.

Florida Attorney General Bill McCollum, a Republican candidate running for governor, said the mandate would cost Florida at least $1.6 billion in Medicaid alone.

All states would receive extra funding to cover Medicaid costs that are expected to rise under the reform, including 100 percent federal coverage for new enrollees under the plan through 2016.

Medicaid is the healthcare program for the poor jointly administered by the states and federal government.