The former Secretary of State Clinton, clinging to a narrow 45 to 42 percent lead over Sanders, spent much of yesterday in western Iowa with her daughter, Chelsea, before heading back to Des Moines, Iowa, for a rally with former president Bill Clinton.

In an apparent jab at Sanders, who has drawn huge crowds with his attacks on the Wall Street and the rich, Bill Clinton decried politicians who did little more than voice the frustration of voters.

As he rallied in Waterloo, Sanders complained he could not keep up with distortions of his record by the Clinton camp which has taken ads suggesting he is attacking Planned Parenthood and protecting the interests of the National Rifle Association.

Texas Senator Cruz questioned his rival's conservative authenticity on abortion and religious liberty and appeared alongside Duck Dynasty's Phil Robertson, who branded same sex marriage 'wicked' and 'evil.'

Meanwhile according to a new CNN/WMUR poll conducted by the University of New Hampshire Survey Centre, Trump backed by 30 percent likely Republican primary voters continues to hold more than double the support over Cruz (12 percent) in New Hampshire.

In the Democratic race, Sanders continues to lead Hillary Clinton by a wide margin, 57 percent to 34 percent in the new poll.

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