DH and I really liked it, but as old Washington hands, we cringed at some of the things the L.A. writers did. There is NO WAY the new President would be taken to the White House. That's why they maintain secure off-site facilities to be used in cases like the one portrayed on the show or 9-11.
The writing errors always bug me -- like when (I have noticed this on NCIS, which theoretically takes place in the D.C. area) characters refer to Interstate highways as "the 95" or "the 495." I know, in California, Interstates are referred to that way, but never in the East. In D.C., it would be "95" or "495." I guess you can file this along with the exterior shots that look nothing like the D.C. area and everything like the California hills. I know verisimilitude is not the objective, but I think they COULD try.