Mayor Antonio Villaraigosa will release his budget proposal on Friday, and, in anticipation, members of SEIU Local 721 are sending him postcards that tell him to come back to Los Angeles and do his job.

The mayor has said layoffs and service cuts will be part of the 2012-13 budget. In protest, the union sent out an email earlier this month calling on Villaraigosa to honor collective bargaining agreements.

The postcards call out the mayor for his frequent trips to Washington, D.C. and North Carolina, where he has been preparing for the Democratic National Convention.

The postcards read:

We know you are busy flying all over the country planning your big convention party and auditioning for your next job. But Los Angeles residents need you now. Our services have been cut to the bone. Our infrastructure is crumbling. We need to do the job we elected you to do, which is manage the city. Here in Los Angeles. So please, come back to L.A. and do your job.