As the dust cleared it was not clear what, if any concrete promises he had won.
NATO Secretary General Jens Stoltenberg on Thursday told CNN that the organisation's member countries have committed to defence spending at two percent of GDP, but would not confirm US President Donald Trump's claim that the target was actually four percent.
US Senator Jeff Flake, a Republican, criticized Trump for saying that.
And while all member nations have agreed, in principle, to work toward the 2 percent spending goal, each country is ultimately beholden to unique political processes and must consult with their respective parliaments to secure increased military spending.
Trump also reiterated an earlier comment he made about this trip, saying of his meetings with America's European and North Atlantic Treaty Organisation allies and then Russia's leader, "Putin may be the easiest of them all".
NATO, a pillar of the global order, emerged from a two-day confrontation with President Donald Trump on Thursday intact but distracted and shaken, a further challenge to the alliance as it faces an expansionist Russian Federation and growing authoritarianism among some of its own members.
Wallace said he will ask Putin about Russian meddling in the 2016 presidential election and potential meddling in the upcoming midterm elections.
United States intelligence agencies concluded that Moscow interfered and Trump has said he would discuss it, although he has stated both a willingness to believe Putin's denials and USA agencies. He urged allies on Wednesday to double their defense spending targets to 4 percent of GDP.
The second day of the defence pact meeting was disrupted and repeatedly rescheduled, as Trump's insistence on renegotiating his allies' defence budgets took precedence over issues such as Ukraine and Georgia's vulnerability to Russian Federation.
Stoltenberg said he had called the extra session because the allies felt the issue of burden sharing needed more discussion.
He insisted it had been a "very good" summit because of the frank and open discussion it had hosted.
"I think, by and large, that the American people are glad to have a president who will be willing to maybe set aside some of the niceties and actually say what he thinks and defend their interests", Cornyn said.
Merkel, who grew up in communist East Germany, shot back that she had "experienced myself a part of Germany controlled by the Soviet Union, and I'm very happy today that we are united in freedom as the Federal Republic of Germany and can thus say that we can determine our own policies and make our own decisions and that's very good".
"I let them know that I was extremely unhappy", he said to reporters.
NATO Secretary General Jens Stoltenberg called an emergency session of all 29 allies to address Trump's demands, and the U.S. leader said his hectoring had paid off.
"For years presidents have been coming to these meetings and have talked about the tremendous expense to the U.S., and tremendous progress has been made", Mr Trump said. "It's very detailed", French President Emmanuel Macron told reporters. We are being played for fools. "After we're at 2 percent, we'll start talking about going higher".
Germany, Europe's biggest economy, spends just 1.24 per cent, compared with 3.5 per cent for the US. On day two he stated that the United States' commitment to the alliance remains "very strong".
Hutchison isn't the only Trump emissary whose mission is, at times, to "calm the waters" after he stirs them, said Francis, the Dallas businessman.
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