What to know

• Artists exit LOOP trek in solidarity with 'Thrift Shop' rapperS1
• The rapper, who was opening for the British talent, was dropped for making a pro-Palestinian speech on stage on September 5.S2
• NEW YORK — Ed Sheeran’s tour of North and South America was plunged into chaos Tuesday when four of his supporting acts abruptly quit in solidarity with the rapper Macklemore, who was dropped for making pro-Palestinian comments onstage. Hours after Sheeran pos...S3