The campaign says the rally is set for the Van Andel Arena in Grand Rapids, Michigan, on March 28. Trump narrowly won the Midwest state's 16 electoral votes in the 2016 presidential election. The president recently declared a national emergency at the border in order to claim federal funding to build a wall there and fulfill a signature promise of his original campaign.
Both the House and Senate voted to block the declaration, but Trump vetoed that measure Friday. It was the first veto of his presidency.