Mar 31 - The New York Senator is digging in her heels and shows no signs of dropping out of the race for the Democratic nomination. Clinton remains behind Obama in the number of pledged delegates by 166, but most polls show her poised to win the Pennsylvania primary by double digits on April 22nd. And after victories in Texas and Ohio one month ago, Clinton says talk of her getting out of the race is very premature. Jon Decker reports. Author: reutersvideo Keywords: Hillary Clinton Barack Obama Reuters presidential election Added: March 31, 2008