When I first started reading the New Yorker when I was in college, among my favorite items was Elizabeth Drew's "Letter from Washington" column. Sadly, Ms. drew didn't survive the onslaught of Tina Brown when she took over the venerable publication in 1992. (Thankfully, Ms. Brown didn't survive her own onslaught either and moved on in 1998.)
Anyhow, Ms. Drew continues to write insightful political commentary, the most recent of which is her outstanding summary of the first 30 days of the Obama Administration in The New York Review of Books. I heartily recommend it.