King was one of 13 state attorneys general who initiated a 2010 lawsuit challenging the constitutionality of the Patient Protection and Affordable Care Act. The suit argued that the individual mandate fell outside of the federal government’s authority and that the requirement for state Medicaid expansion of coverage violated state sovereignty. The case was ultimately heard before the Supreme Court, which ruled to uphold the individual mandate as falling within Congress’ authority to levy taxes and struck down the Medicaid expansion as being unduly coercive in light of the withholding of funding that would result from noncompliance. Gamble death sentence King sought to set execution dates in Alabama at a time when several states voluntarily suspended executions during United States Supreme Court litigation over lethal injection. In 2007, Robert E. Owens, a Shelby County district attorney, supported commutation of the death sentence for twenty-nine year old LaSamuel Gamble, an accomplice in a case where the actual shooter had escaped the death penalty following a United States Supreme Court ruling that argued that "it was unconstitutional to impose capital punishment on defendants who were under 18 at the time of their crimes." King said Owens "had acted on the side of the criminal" and notified him that he was seeking to reinstate the death penalty. Critics of the Alabama Attorney General believed the decision was politically motivated. Despite the controversy, King received the support of the victim's family in addition to state death penalty supporters for his stance in the case. Sex toy ban King replaced William Pryor as the defendant in the Williams v. Morgan (2007) case following his appointment in 2004. The case came about as a result of the ACLU filing suit on behalf of individual users and vendors of sexual devices to enjoin the enforcement of the Anti-Obscenity Enforcement Act of 1998, an Alabama statute that prohibits the sale of any “device designed or marketed as useful primarily for the stimulation of human genital organs." They based their argument primarily on the ruling of the Lawrence vs. Texas (2003) Supreme Court case, "which decriminalized gay sex on privacy grounds, [which they believe] protects sex toy users from unwarranted state intrusion in their homes." The Atlanta-based 11th United States Circuit Court of Appeals ruled against the ACLU believing that "siding with the sex toy merchants could open the door to the legalization of undesirable sexual behavior such as prostitution." Although they appealed to the United States Supreme Court, they refused to hear the case. King argued that as the state's attorney general he must defend the law. King's position received extensive criticism from gay rights activists and social libertarians. Loretta Nall, 2006 Alabama gubernatorial candidate and founder of the United States Marijuana Party (USMJP), organized a sex toy drive to encourage people to mail sex toys to the Alabama Attorney General.

King replaced William Pryor as the defendant in the Williams v. Morgan (2007) case following his appointment in 2004. The case came about as a result of the ACLU filing suit on behalf of individual users and vendors of sexual devices to enjoin the enforcement of the Anti-Obscenity Enforcement Act of 1998, an Alabama statute that prohibits the sale of any “device designed or marketed as useful primarily for the stimulation of human genital organs." They based their argument primarily on the ruling of the Lawrence vs. Texas (2003) Supreme Court case, "which decriminalized gay sex on privacy grounds, [which they believe] protects sex toy users from unwarranted state intrusion in their homes." The Atlanta-based 11th United States Circuit Court of Appeals ruled against the ACLU believing that "siding with the sex toy merchants could open the door to the legalization of undesirable sexual behavior such as prostitution." Although they appealed to the United States Supreme Court, they refused to hear the case. King argued that as the state's attorney general he must defend the law. King's position received extensive criticism from gay rights activists and social libertarians. Loretta Nall, 2006 Alabama gubernatorial candidate and founder of the United States Marijuana Party (USMJP), organized a sex toy drive to encourage people to mail sex toys to the Alabama Attorney General.

King sought to set execution dates in Alabama at a time when several states voluntarily suspended executions during United States Supreme Court litigation over lethal injection. In 2007, Robert E. Owens, a Shelby County district attorney, supported commutation of the death sentence for twenty-nine year old LaSamuel Gamble, an accomplice in a case where the actual shooter had escaped the death penalty following a United States Supreme Court ruling that argued that "it was unconstitutional to impose capital punishment on defendants who were under 18 at the time of their crimes." King said Owens "had acted on the side of the criminal" and notified him that he was seeking to reinstate the death penalty. Critics of the Alabama Attorney General believed the decision was politically motivated. Despite the controversy, King received the support of the victim's family in addition to state death penalty supporters for his stance in the case.