South African opposition party the Economic Freedom Fighters has written to the speaker of parliament seeking to block lawmakers from meeting on Wednesday to vote on the next stage of the budget process.

The rand is under pressure as markets sit on edge, waiting to see what happens with the crucial budget vote on Wednesday—and what it means for the future of the GNU.

A South African parliamentary panel has approved a fiscal framework for the national budget, but with a condition that the Finance Minister review a proposal to increase taxes. Lawmakers will vote on the budget on Wednesday,