West Wing Reunion: Allison Janney, Bradley Whitford 'Walk-and-Talk' on The Late Late Show — WATCH

Crafting James Corden’s monologue is serious business — so much so that it sometimes requires a walk-and-talk with White House Press Secretary C.J. Cregg and Deputy Chief of Staff Josh Lyman.

Allison Janney and Bradley Whitford reprised their iconic West Wing roles on the Late Late Show Wednesday to help the CBS funnyman put together a tight opening act featuring hilarious one-liners about presumptive GOP nominee Donald Trump and probable Cinco de Mayo festivities. The fourth wall was eventually broken when the trio contemplated whether it made sense to do a West Wing sketch in the year 2016.

Watch the mini-reunion play out above.