ANAMOSA, Iowa (AP) — The race for the Republican presidential nomination is deeply unsettled with an anything-can-happen feel six weeks before Iowans start the state-by-state process of choosing a GOP challenger for President Barack Obama.

Hoping to sway the many voters who are still undecided, most of the contenders visited the state in the past week and the pace of campaigning is certain to accelerate after Thanksgiving, when the monthlong sprint to the Jan. 3 caucuses begins. A crush of new TV ads is certain. Expect mailboxes filled with brochures and repeated visits by candidates to diners, town squares and other must-stop venues.