A white officer kneeled on his neck until he lost consciousness. The president's message comes as Muriel contracted painters to imprint yellow letters down a busy DC street, a message in support of the anti-racist protests. White House spokesman Hogan Gidley on Thursday said that the president holds the sole ability to invoke the 1807 Insurrection Act, which would see the deployment of military troops across the country in order to suppress ongoing civil unrest.