Candidates are criss-crossing Iowa, one week before the voting begins.

FOX's Jared Halpern looks at the Democratic race:

Exactly one week ahead of the Iowa caucuses, serious tightening in the Democratic race:

(Clinton) "I will be a better President. A more informed and more understanding President."

But Hillary Clinton's front-runner status has been challenged by Senator Bernie Sanders, joking in Ames, Iowa, about his unconventional style:

(Sanders) "He combs his hair just right. He has the G-Q kind of look."

Clinton's camp is trying to manage expectations in Iowa and New Hampshire, confident she has a firewall among minority voters once the voting moves South and West.

Jared Halpern, FOX News.