Thousands of anti-migrant protesters march in South Africa amid heavy police presence

The lead

Thousands of people have already left South Africa ahead of the deadline set by anti-migrant groups

What shifts

For those following thousands, anti, migrant, protesters, march, this report from BBC introduces a variable that could shift existing calculations.

The wider picture

Earlier reporting from BBC and comparable outlets sketched the conditions that would eventually produce an event like this.

Where this fits in Signal Ledger

Related coverage from the World desk.

• Supreme Court's birthright ruling is major blow to Trump
• Senegalese MPs move to clip presidential powers as tensions mount
• US Supreme Court upholds bans on transgender women in female school and college sports

The editorial line

Signal Ledger reads this through the lens of thousands, anti, migrant, protesters, march: Thousands of people have already left South Africa ahead of the deadline set by anti-migrant groups.