Credit the Today show for having on a very feisty Pat Buchanan and Chuck Colson this morning to balance out the huzzahs for Vanity Fair and Mark Felt. Buchanan ended by saying Woodward and Bernstein ended up as “stenographers.” Matt Lauer felt compelled to tout them for having kept the Deep Throat secret for decades. Why wouldn’t they keep the secret? It’s been a celebrated multi-millionaire’s life for those two since Watergate, and the Deep Throat thing was a juicy part of the legend. Woodward has built his whole career as Washington’s leading investigative journalist on this legend, preserving his cachet even through strange episodes like his “deathbed interview” with William Casey for his book “Veil.” Carl Bernstein has cycled through a pile of high-paying, low-achieving jobs at ABC News and Time magazine, among others. Without all the “Deep Throat” glory — which was added for spice to the book and movie “All the President’s Men” — their legend wouldn’t have had as much staying power.