Marine General Joseph Dunford, the chairman of the US military's Joint Chiefs of Staff, said he invited Kushner and Tom Bossert, White House homeland security adviser, to accompany him so they could hear "first-hand and unfiltered" from military advisers about the situation on the ground and interact with USA forces.
He has criticized Kushner, Trump's son-in-law and senior adviser, for his more politically moderate approach.
Rep. Steve King (R-Iowa) on Sunday tweeted at President Trump, calling White House chief strategist Stephen Bannon a "lynchpin" between the president and grassroots voters.
Steve Bannon, the bomb-throwing former Breitbart executive who serves as President Donald Trump's chief strategist, was huddling at an out-of-the-way table with Trump's son-in-law Jared Kushner in an attempt to broker peace in a deepening - and, increasingly, distracting - rift between rival West Wing factions.
The apparent feud spilled out into the open this week after it was announced that Bannon was removed from Trump's National Security Council (NSC).
Rumors of a shakeup in administration staff have been stirring, with administration officials telling The Wall Street Journal Trump is growing frustrated with the in-fighting between his staff.
The president ordered air strikes against Syrian targets that drew praise in many parts of the world and staged an error-free summit with Chinese president Xi Jinping.
Jared Kushner, left, and Stephen Bannon, shown December 1, 2016, have not seen eye to eye recently.
Bannon reportedly resents Kushner for bringing figures associated with Democrats into the White House. "The only thing we are shaking up is the way Washington operates as we push the President's aggressive agenda forward", she said.
Trump wants to drop Priebus for two very simple reasons - he failed to deliver the votes for POTUS to repeal and replace Obamacare and is the one who vouched for Sean Spicer, the White House press secretary, who has been nothing but an embasement for the White House. That group includes Kushner, who has emerged as a troubleshooter for the president and has clashed with Bannon.
Earlier in Trump's administration, news coverage focused on possible tension between Bannon and Priebus, the former chairman of the Republican National Committee.
Chief of Staff Reince Priebus told the two to smooth out their differences, reports indicate.