It suddenly dawned on the US President Donald Trump that there was no need to defend Germany from Russia.
He wrote about this on his Twitter.
Berlin and Moscow are forging cooperation in different areas (especially Trump was touched by the energy) and their relationship is far from the stage when one country needs protection from another.
In addition, the American president is outraged that Germany does not want to spend more money on NATO and increase its contribution to the Alliance to 2% of GDP.