Former senator Claire McCaskill said she feels nostalgia for the days when former White House national security adviser John Bolton was the villain. 
As Democrats move forward with an impeachment inquiry, the media is hoping that former national security adviser John Bolton testifies against President Donald Trump. 
John Bolton is out as national security adviser, President Donald Trump said in a tweet Tuesday. KIEV (Reuters) - U.S. National Security Adviser John Bolton warned on Wednesday of the threat of unfair Chinese trade practices during a trip to Kiev and said he had discussed his concerns with officials, including President Volodymyr Zelenskiy. 
KIEV (Reuters) - John Bolton, U.S. President Donald Trump's national security adviser, said on Tuesday that he had traveled to Kiev to hear the priorities of the new government following the election of President Volodymyr Zelenskiy. 
LIMA (Reuters) - U.S. national security adviser John Bolton on Tuesday said Washington was ready to impose sanctions on any international company doing business with Venezuelan President Nicolas Maduro, a sharp escalation of U.S. pressure on the leftist leader. 
China's Defense Ministry this week confirmed the test firing of a new submarine-launched ballistic missile the Pentagon regards as a strategic weapon capable of striking anywhere in the United States from underwater launch points. 
Russia has dispatched several warships, including one of its newer missile frigates, to Cuba in a bid to bolster the floundering regime of Venezuelan dictator Nicolas Maduro, according to a senior administration official. 
The United States is likely to take military action against Iran in the coming days for Tehran's downing a U.S. drone in international airspace on Wednesday near the Strait of Hormuz. 
China is continuing cyberattacks against government and private sector networks aimed at obtaining intellectual property to support China's military buildup and economic modernization, White House National Security Adviser John Bolton says. 