Veteran statesman has visited both Trump and Putin in recent months.
'In revealing the facts, the government may also reveal how we got them.'
From Trump to Brexit, we asked our columnists.
The Russian president's comments come as US intelligence agencies said he was directly involved in DNC hack.
In the letter Putin emphasised the importance of renewing Russia-US relations.
United States will 'outmatch' world powers as it build's up its nuclear capability, says president-elect
During annual marathon press conference Russian President speculates 'maybe it was some guy sitting on a couch who did it.'
The president-elect previously said it is important to be 'unpredictable when it comes to nuclear weapons.
President Barack Obama, Nato, and former Defence Secretary Dick Cheney rank Vladimir Putin high on list of threats to west.
Cybersecurity firm that investigated DNC hack offers more evidence tying Russia to US election intrusions
Russian president postpones annual press conference to pay tributes to the late envoy.
According to reports foreign loans accepted by France's National Front are being probed by the US
Christmas celebrations were briefly disrupted by an explosion, but no injuries were reported.
There's a lot more to Donald Trump's pick for Secretary of State than his dealings with Russia's Vladimir Putin.
Labour leader does not understand Syria is an open sore, from which the poison of fascist populism is spreading.
Top concern for Nato and Pentagon ignored by President-elect, who wants to concentration on Islamic extremists.
Turkish and Russian voices are using this latest attack to drive a wedge between Turkey and the West.
Russian president tells Turkey 'we have to know who organised this killing and gave orders to the assassin'.
American 'deep state' conspiracy could result in president-elect's impeachment, argues Russian media
Kellyanne Conway says Obama is 'under political pressure' to take tough stance against Russia.
Leak reveals he has been director of ExxonMobil's Russian subsidiary Exxon Neftegas since 1998.
During the election campaign WikiLeaks had published Hillary Clinton's campaign chief John Podesta's emails.