Denmark’s government was cautiously optimistic on Saturday following US President Donald Trump’s announcement of a deal on Greenland to bolster US military presence there but keep the island under Danish control after months of threats by the US president to seize the semi-autonomous territory of a Nato ally. The Arctic island’s top leaders echoed that stance and said the deal, which has not yet been made public, was long in coming. US, Greenlandic and Danish officials had quietly negotiated for...