Ms Merkel had already begun finessing her message on Monday, stressing that she was a "convinced trans-Atlanticist", a message she repeated after a meeting with visiting Indian Prime Minister Narendra Modi in Berlin.
Spicer said that Trump feels he and Merkel have a "fairly unbelievable" relationship.
Last week, he told assembled European officials something to the effect of: "Germans are bad, really bad".
But she said her priority was achieving certainty for European Union citizens in Britain and Britons in the European Union after Brexit, though this was just one task of many in a withdrawal process whose consequences would be felt years into the future.
US President Donald Trump called Germany's trade and spending policies "very bad" yesterday (30 May), intensifying a row between the longtime allies and immediately earning himself the moniker "destroyer of Western values" from a leading German politician.More news: Firing kills five during farmers' protest in Madhya Pradesh
"I think the relationship that the president has had with Merkel, he would describe as fairly unbelievable", Spicer said when asked about the relationship between the US and Germany.
"Europeans think they are now being treated worse by Trump than countries like Russian Federation or Saudi Arabia", said Stephan Bierling, an expert on transatlantic relations at the University of Regensburg in Germany. "The U.S. Senate should switch to 51 votes, immediately, and get healthcare and TAX CUTS approved, fast & easy".
A third: Europe makes US chemical and pharmaceutical companies work their way through a maze of regulatory controls.
It would make as much sense for the European Union to complain to Texas about USA immigration or foreign policy as it makes for Trump to complain about German trade or monetary policy.More news: WWE Monday Night Raw: extreme rules fallout
To others, however, the Europe-U.S. tensions over defense spending, trade deals and climate change are real, growing and could ultimately lead to shifts in alliances if Trump does not temper his tone.
While it's unclear whether Merkel has deliberately picked a fight with Trump, challenging his stance is popular in Germany.
Mr Dubke, a communications firm owner who was brought into the Trump administration in March, submitted his resignation on 18 May, though he has not set a last day on the job and is leaving on good terms, according to Axios News, which first reported his departure, citing a senior administration official.
At the G7 summit, the six other nations were at odds with Trump on climate change and migration. Mr Richard Haass, who as president of the Council on Foreign Relations is the doyen of the USA foreign policy establishment, tweeted: "Merkel saying Europe can not rely on others & needs to take matters into its own hands is a watershed - & what United States has sought to avoid since WW2".
"China will continue to implement promises made in the Paris Agreement, to move towards the 2030 goal step by step steadfastly", Li said in a Berlin joint press conference with German Chancellor Angela Merkel.More news: IS-claimed attacks on Iran's parliament, shrine kill 12
Trump could reasonably call for Merkel to embrace a combination of three economic policies.
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