Are federal officials allowed to say ‘Merry Christmas’?

Are federal officials allowed to say ‘Merry Christmas’?

From the Oregonian:

Newt Gingrich says the nation’s obsession with being politically correct has come to this: Federal officials aren’t allowed to say “Merry Christmas.”In a campaign appearance in Davenport, Iowa, Gingrich said that “no federal official at any level is currently allowed to say ‘Merry Christmas.’

Find out if this is true.

http://www.politifact.com/truth-o-meter/article/2011/dec/21/are-federal-officials-allowed-say-merry-christmas/