Mack Trucks workers reject tentative deal, will join nationwide auto strike

UAW Mack Trucks union members voted down tentative deal and will join autoworkers strike on Monday.

About 3,900 Mack Trucks workers will strike at facilities in Pennsylvania, Maryland and Florida.

Mack Trucks deal seen as test of willingness to ratify deals that don't meet demands like Detroit automakers.

Tentative deal included 19% wage increase but not demands like elimination of wage tiers.

UAW President said members have spoken and union remains committed to exploring options for agreement.