President Trump unleashed his frustration with the press and the probes into Russia's connections with his team in a Sunday Twitter rant.
Reports on Friday said that Russian Ambassador Sergey Kislyak told the Russian government in December that Kushner, President Donald Trump's son-in-law and senior aide, had requested a back-channel with Russia for Trump's team.
Kushner, 36, even suggested using Russian diplomatic facilities in the United States to protect such a channel from monitoring, The Post said, quoting USA officials briefed on intelligence reports.
The Administration's defence of Kushner coming after it was reported Kushner participated in discussions with Russia's envoy over on setting up a secret back-channel communications link between the White House and the Kremlin.
Trump then criticized the media's use of unnamed sources saying that it was "possible that those sources don't exist".
As they return to the US after days on the global stage, Trump and White House aides face the prospect of weeks and months of investigations into their alleged ties to Russian officials during the real estate mogul's long run for the presidency and accusations from opposition Democrats that he has tried to obstruct justice and curtail the probes.
"We have backchannel communications with any number of individual (countries)", he said.
White House officials defended the concept of secret communications channels without commenting specifically on the Kushner case.
Mr Kelly, the homeland security secretary, carried the same message on Sunday.
"It's both normal, in my opinion, and acceptable", he said on ABC's "This Week" programme. "Any way that you can communicate with people, particularly organizations that are maybe not particularly friendly to us, is a good thing".
After maintaining a limited social media presence throughout his trip, Trump on Sunday unleashed a furious flurry of tweets, lashing out at what he called the "fake news" media.
The newspaper cited anonymous US officials who were briefed on intelligence reports on intercepted Russian communications.
US Representative Adam Schiff, the top Democrat on the House Intelligence Committee, said such secret channels may be used in situations including peace talks with the Taliban in Afghanistan or for the release of American hostages.
But Rep. Raja Krishnamoorthi, a Democrat on the House Oversight Committee, said Kushner should not be in possession of security clearance while the investigation was underway.
"You have to ask, well, who are they hiding the conversation from?" he said on ABC.
If the reports of Kushner's undisclosed meetings are accurate, then the bottom line is that he was not truthful.
Earlier this month, reports said that Mr. Trump told Russian diplomats that firing "nut job" FBI Director James Comey relieved "great pressure" on him, and that a senior adviser in his White House is a significant person of interest in the FBI's investigation into Russian election meddling.
The unanswered questions about Russian Federation may add to declining USA relations with European allies. They're staying put but have previously told friends they will continue to evaluate and reassess whether they plan to stay in Washington.
US President Donald Trump and first lady Melania Trump walk from Marine One across the South Lawn to White House in Washington, Saturday, May 27, 2017, as they return from Sigonella, Italy.