From the Tenth Amendment Center, Obama’s Imperial Decree: Target Oklahoma
The state of Oklahoma is now the target of a direct challenge from US Attorney General Eric Holder, who is using the Civil Rights Act of 1964 as justification to violate Oklahoma’s sovereignty as affirmed by the Tenth Amendment to the US Constitution.
In a letter written to the State Attorney General in April, the Federal government used aggressive language, bringing up the possibility of withholding Federal funds appropriated for Oklahoma. The reason? A proposed amendment to the State Constitution, which requires voter approval, that would make English the official language of the State.
More at the link.