Hillary Clinton can't stop herself from laughing at Trump during inauguration speech

Former Secretary of State Hillary Clinton couldn't help but laugh when Donald Trump said that he was signing an executive order to rename the Gulf of Mexico to the Gulf of America.

Trump made the vow during his inaugural address inside the Capitol on Monday.

"America will reclaim its rightful place as the greatest, most powerful, most respected nation on earth inspiring the awe, admiration of the entire world" Trump said during his inauguration speech. "A short time from now, we will be changing the name of the Gulf of Mexico to the Gulf of America and we will be restoring the name of a great president, William McKinley, to Mount McKinley, where it should be and where it belongs."

Clinton can be seen giggling to herself while keeping her eyes lowered. No one around her seemed to notice.

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CBS News reported, "During the transition, Mr. Trump had vowed to rename the Gulf of Mexico the Gulf of America. Rep. Marjorie Taylor Greene said last week that she would direct her staff to draft legislation for the renaming that would make it effective on federal maps and administrative policy. While the name change could be applied for federal references, other nations would have no obligation to follow suit."

According to the U.S. State Department, the Gulf of Mexico is officially split between the U.S. and Mexico beginning at the center of the mouth of the Rio Grande, with the U.S. having "maritime jurisdiction" over its portion and Mexico having jurisdiction over its portion.

Earlier in the day Trump fans watching the inauguration on screens at the Capital One arena loudly booed and chanted, "Lock her up!" as Clinton and her husband, former President Bill Clinton, took their seats at the Capitol.

Trump started the "Lock her up!" chants when he ran against Clinton — whom he called "Crooked Hillary" — for the presidency in 2016.