U.S. President Barack Obama will press Senate Republican leaders on Tuesday to fill the vacancy on the Supreme Court created by the death of Justice Antonin Scalia, despite Republican vows to not to act on anyone he nominates.

Obama is slated to speak at 11:30 a.m. EST (1630 GMT) with Senate Majority Leader Mitch McConnell and the Republican head of the Senate Judiciary Committee Chuck Grassley at the White House.