In a signing statement that the White House quietly issued after 9 p.m. on Monday — about six hours after Mr. Trump signed the bill in a televised ceremony at Fort Drum in New York — Mr. Trump deemed about 50 of its statutes to be unconstitutional intrusions on his presidential powers, meaning that the executive branch need not enforce or obey them as written.
Among them was a ban on spending military funds on “any activity that recognizes the sovereignty of the Russian Federation over Crimea,” the Ukrainian region annexed by Moscow in 2014 in an incursion considered illegal by the United States. He said he would treat the provision and similar ones as “consistent with the president’s exclusive constitutional authorities as commander in chief and as the sole representative of the nation in foreign affairs.”
.. The statement was the latest example of Mr. Trump’s emerging broad vision of executive power. His personal lawyers, for example, have claimed that his constitutional authority to supervise the Justice Department means that he can lawfully impede the investigation into Russia’s interference in the 2016 election no matter his motive, despite obstruction-of-justice statutes.
.. The American Bar Association in 2006 took the position that presidents should not use signing statements, but should instead veto legislation if it has constitutional defects so that Congress has an opportunity to override that veto if lawmakers disagree. But presidents of both parties, including Barack Obama, have continued to use them, with current and former executive branch lawyers arguing that the focus should be on the credibility of the legal theories that presidents invoke when they make their objections.