The clash between U.S. President Donald Trump and Tesla (TSLA.US) founder Elon Musk on social media continued to escalate. Trump lately criticized Musk, calling him crazy, and hinted at the possibility of terminating his government contracts.Tesla's stock last tumbled 15% at US$281.77.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)Related NewsNon Farm Payrolls for May in United States is 139K, lower than the previous value of 147K. The forecast was 130K.