Florida’s attorney general questioned the constitutionality of the federal health care bill on Tuesday, calling on states to study whether to file suit to kill a provision requiring that individuals buy health insurance or pay a fine. The attorney general, William McCollum, a Republican who is running for governor in 2010, said that the so-called mandate was “an affront to our country’s principles.” He added that the fine might be illegal because, in his view, it is disconnected from any commercial act. “It’s a tax on living,” Mr. McCollum said in a telephone conference call with reporters. “It’s a tax...