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If President Trump truly did ask James Comey to end the investigation into national security adviser Michael Flynn -- as the former FBI director is said to have claimed in a memo -- then the United States has reached a rare tipping point, David Gergen said Tuesday night.

A friend of President Donald Trump told CNN that former FBI Director James Comey should not have gone to Congress with the information he detailed in a memo -- as some have suggested -- explosive details from which were made public Tuesday.

The Department of Homeland Security renewed a bulletin late Monday that warned of the dangers posed by homegrown terrorists and called the threat environment in the country one of the "most serious" since the 9/11 attacks.

Attorney General Jeff Sessions and deputy Attorney General Rod Rosenstein have interviewed multiple candidates for FBI director, according to sources familiar with the process who described the hour-long interview sessions as professional and business-like.

President Donald Trump's consequential meeting with two of Russia's top foreign operatives earlier this month has cast a pall over his administration, raising questions about the President's ability to handle classified information when meeting with sometimes adversarial foreign leaders.

CNN senior legal analyst Jeffrey Toobin said Tuesday if President Donald Trump told the FBI to end a probe into former national security adviser Michael Flynn, then it would amount to obstruction of justice.

Idaho Sen. James Risch came to President Donald Trump's defense on Tuesday, a day after the Washington Post reported the President had shared classified information with Russian officials.

The Senate intelligence committee is seeking information from the White House on Tuesday about claims that President Donald Trump apparently disclosed classified information to Russian officials.

It's hard to know, when you live in the eye of the storm, whether the White House is truly at a tipping point, Trump's allies and friends are finding.

Republicans and Democrats alike are voicing frustration, distrust and irritation Tuesday with the constant stream of controversies coming out of the White House.

US Ambassador to the UN Nikki Haley pledged Tuesday that the US plans to "tighten the screws" on North Korea's nuclear ambitions.

The revelation that President Donald Trump reportedly disclosed highly sensitive information to Russian officials is raising questions among some allied intelligence agencies about the security of details they share with their US counterparts.

Sen. Mazie Hirono announced Tuesday she has been diagnosed with kidney cancer and will undergo surgery.

Democratic Rep. Elijah Cummings said Tuesday that House Republicans would have already impeached Hillary Clinton if she had done a fraction of what Donald Trump has done as President.

Several vulnerable House Republicans representing districts Hillary Clinton carried in 2016 have publicly distanced themselves from President Donald Trump since Monday night.

The crisis-battered White House battled to avert what one top GOP senator warns is a "downward spiral" on Tuesday, following reports that President Donald Trump divulged highly classified information to two top Russian visitors to the Oval Office.

Sen. John Cornyn, the second ranking Republican in the Senate, has asked to be removed from consideration to be the next FBI director, the Texan said in a statement.

Four years to the day before President Donald Trump was reported to have shared highly classified information with the Russian foreign minister and the Russian ambassador to the US, he wondered how much more scandal Washington could handle.

H.R. McMaster, national security adviser to President Donald Trump, declined to say Tuesday whether the Western Wall is in Israel, furthering a controversy over the site ahead of Trump's visit to the country next week.