Representative Betty McCollum, Democratic chair of the House Appropriations subcommittee, meanwhile attacked Trump over his reallocation of $2.5m (£1.9m) from the National Parks Service to pay for the day's festivities: "These fees are not a slush fund for this administration to use at will. They are meant to improve our national parks, keep them safe and protected for Americans to enjoy, and are clearly not to be used for a political rally.”