One of them, South Carolina Sen. Tim Scott - the chamber's only black Republican - announced his opposition after he said he had read a U.S. Justice Department memo examining postcards sent to black voters before the 1990 election.
"Having grown up in neighborhoods that would have benefited from school choice, I know firsthand the amazing opportunities that can be opened for children when they're afforded that opportunity," Mr. Scott said. "I have visited multiple schools in Washington that utilize the D.C. Opportunity Scholarship Program and know for a fact that parents and students see it as an absolute blessing. I look forward to permanently authorizing the SOAR Act and continuing to open doors for some of our most overlooked communities."