I suppose it's due to the margin of error when polling & the trend in polling.

Fivethirtyeight now has Clinton with a 28% chance to win Alaska, whereas when the polling gap was bigger she only had around a 13% chance of winning our state.  Trump could continue to go down in the polls following this video and the remaining two debates.  If more voters flock to Clinton or if they even just flock from Trump to Johnson or Stein that puts Clinton within striking distance.  So I'd say it is responsible journalism to report the polling change.

http://projects.fivethirtyeight.com/2016-election-forecast/alaska/