This doesn't take place at a "location" in the traditional sense in screenwriting and you want to be sure that the reader "gets it." I would do the following:
INSERT TV VIDEO
INT. SUNSET MANOR RETIREMENT HOME - DAY
CANDIDATE SMITH, all smiles as she greets and shakes the hands of the assembled elderly in the day room of a nondescript retirement home.
ANNOUNCER (V.O.)
Connie Smith cares about senior citizens and their future.
Smith escorted down a hallway to a room.
ANNOUNCER (V.O.)
She knows what it's like to leave a loved one in the care of others.
Smith greets a bedridden man and lovingly touches his brow.
ANNOUNCER (V.O.)
She's had to make the hard decisions just like you.
Smith in her office.
ANNOUNCER (V.O.)
She'll push, shove and railroad pork barrell legislation to protect those you love.
Smith greets constituents.
ANNOUNCER (V.O.)
A vote for Connie Smith is a vote for those who can't that'll can those who won't.
Smith stands before a waving flag.
BACK TO SCENE
The INSERT signals that it's out of the ordinary. Other options include getting a copy of BROADCAST NEWS or NETWORK to see how they did it.