Speechwriters must delve into the mind of the president. The finished text must be a reflection of the speaker.

Writing speeches is, in a sense, being the mirror of another person. Joe Biden's biggest political liability remains his age (81) and voters' doubts about whether he is still fit to serve (last week his doctor declared him fit for duty) The State of the Union address is a process that takes months, with countless talks and input from various federal agencies and others outside the president's inner circle.