Jack Balkin, the Knight Professor of Constitutional Law and the First Amendment at Yale Law School, suggested two other ways to solve the debt ceiling crisis: he pointed out that the US Treasury has the power to issue platinum coins in any denomination, so it could solve the debt ceiling crisis by simply issuing two platinum coins in denominations of $1 trillion each, depositing them into its account in the Federal Reserve, and writing checks on the proceeds. Another way to solve the debt ceiling crisis, Balkin suggested, would be for the federal government to sell the Federal Reserve an option to purchase government property for $2 trillion. The Federal Reserve would then credit the proceeds to the government's checking account. Once Congress lifted the debt ceiling, the president could buy back the option for a dollar, or the option could simply expire in 90 days. In a report issued by the credit rating agency Moody's, analyst Steven Hess suggested that the government should consider getting rid of the limit altogether, because the difficulty inherent in reaching an agreement to raise the debt ceiling "creates a high level of uncertainty" and an increased risk of default. As reported by "The Washington Post", "without a limit dependent on congressional approval, the report said, the agency would worry less about the government's ability to meet its debt obligations." Other public figures, including Democratic ex-President Bill Clinton and Republican ex-CBO director Douglas Holtz-Eakin, have suggested eliminating the debt ceiling. During the debate, some scholars, Democratic lawmakers, and Treasury Secretary Tim Geithner suggested that the President could declare that the debt ceiling violates the Constitution and issue an Executive Order to direct the Treasury to issue more debt. They point to Section 4 of the Fourteenth Amendment to the US Constitution, passed in the context of the Civil War Reconstruction, that states that the validity of the public debt shall not be questioned. Others rebutted this argument by pointing to of Article 1 and Section 5 of the Fourteenth Amendment, which state that Congress has the power of the purse and the authority to enforce the Fourteenth Amendment. US law does not place a limit on the denomination of minted coins, and specifically mentions that the Mint can create platinum coins of arbitrary value under the discretion of the Secretary of the Treasury. Yale law professor Jack Balkin mentioned seigniorage as a solution, although there had been speculation about the option of a "trillion-dollar coin" online since at least January 2011. Hence it has been suggested that a coin with a face value of a trillion or more could be minted and deposited with the Federal Reserve and used to buy back debt, thus making funds available.