Sweet: Obama, Clinton spots. Softer sell for the holiday.

CHICAGO–With the holiday season started, the presidential campaigns in Iowa want to keep pushing–but not intrude. It is a delicate balance. The Obama campaign on Wednesday released this holiday greeting from the Obama family. Last week, the Clinton team produced an ad featuring Clinton, her mother Dorothy Rodham and her daughter Chelsea.

(The Clinton video has a package of some other spots from her campaign; links at the bottom)

Ads are running on Des Moines television for a host of candidates. on the Dem side Obama, Hillary Rodham Clinton, John Edwards, Chris Dodd, Joe Biden.

Plus–Clinton has third party ads running on her behalf from AFSCME.

Republicans on tv include Ron Paul, Mitt Romney and Mike Huckabee.