The Uncommitted Movement announced Thursday that it would not endorse Vice President Kamala Harris as the Democratic candidate for president.

“Vice President Harris’s unwillingness to shift on unconditional weapons policy or to even make a clear campaign statement in support of upholding existing U.S. and international human rights law has made it impossible for us to endorse her,” Uncommitted said in a statement released alongside a Thursday morning press conference.

The group said at the press conference that the move came after Harris refused to meet with Uncommitted. Uncommitted delegates gave Harris until September 16 to meet with them in the crucial swing state of Michigan. The deadline passed earlier this week.