German Chancellor Angela Merkel on Sunday declared a new chapter in U.S.-European relations Sunday after contentious meetings with President Trump last week, saying Europe “really must take our fate into our own hands.” Hours later, he blasted European leaders at NATO for failing to spend enough on defense, while holding back from offering an unconditional guarantee for European security. [...] at the Group of Seven summit of leaders of major world economies Friday and Saturday, he refused to endorse the Paris agreements on combatting climate change, punting a decision until this week. [...] they carry extra heft now that Trump is in office — and after Trump had a days-long opportunity to reset relations with Washington’s closest allies. Days later in Brussels he offered a scathing assessment of Washington’s closest allies, saying they were being “unfair” to American taxpayers.