Politics | Hillary Clinton Crunch Time in Iowa: Rivals Step Up Attacks Tight races on both sides mean no let-up in campaigning By John Johnson Posted Dec 29, 2007 7:31 PM CST Copied Republican presidential hopeful, Sen. John McCain, R-Ariz., addresses a crowd during a campaign stop, in Dover, N.H., Saturday, Dec. 29, 2007. (AP Photo/Steven Senne) (Associated Press) Presidential candidates blitzed through Iowa on the final weekend before next week's caucuses looking to lock up the all-important camp of undecided voters, Reuters reports. The Republican race continued to turn negative, with Romney going after both McCain and Huckabee in new ads, and both candidates striking back at him on the trail. Democrats Clinton, Obama, and Edwards remained in a dead heat, squabbling over who is most ready to lead the nation. As many as one-third of Iowa voters in both parties have yet to make up their minds about a candidate, the Wall Street Journal notes. With the races so tight, the campaigning will go down to the wire before Thursday's caucuses. Read These Next New Fox star, 23, misses first day after car troubles. Iran's supreme leader makes first public comments since ceasefire. Man accused of killing his daughters might be dead. Her blood isn't compatible with anyone else's. Report an error