Elizabeth in the Running 

On November 20th, 2014, Elizabeth is shown to be the top progressive choice for President In 2016. In a CNN poll titled, "Liberal 2016 poll: Elizabeth Warren beating Clinton by double digits," it reads: 

"In fact, Clinton doesn't even make second place. Forty two percent of respondents favor Warren, and Vermont Independent Senator, Bernie Sanders, also edges out Clinton with 24% compared to her 23%. 

-According to results from the 2016 Presidential Pulse Poll commissioned by progressive grassroots organization Democracy for America."

http://www.cnn.com/2014/11/20/politics/elizabeth-warren-leads-poll/

Not even a month later, Politico.com did a poll of the “Presidential Election of 2016” from December 3rd-9th, 2014 which surveyed 429 national democrats and democratic-leaning independents. Hilary came out first with 62% of the votes, Joe Biden with 11% and Elizabeth warren with 9% followed by lower scores of Bernie Sanders, Martin O’Malley and Jim Webb.

http://www.politico.com/p/polls/person/latest/elizabeth-warren

Why would it only take 13 days for these two polls to contradict each other on a large scale? 

Many polls are very biased and can lead to false pretenses. 

About 2 and a half months later (February 25, 2015) , we see that if Clinton were "not to run for President, both Joe Biden (45/39) and Elizabeth Warren (43/41) would trail Jeb Bush in hypothetical contests. We've pretty consistently found Clinton running about 10 points better against the Republican field than potential Democratic alternatives.

http://www.publicpolicypolling.com/main/elizabeth-warren/

Why such a long stretch between polls and we still see consistency between the last two polls, compared to the first CNN poll? 

Many people find that CNN is considerably favored toward the Democratic party, which brings difficulties in receiving honest poll data in a non biased form.

Seeing such drastic changes within two weeks and then consistency between two polls taken 2 and a half months apart shows us that polls can change drastically in a little amount of time. With these significant changes, we can't assume that what we see in polls is honest, non biased or even a reflection of how the political race is running. Between the changes in ideas, positions, issues and acts in the election realm, we can learn that polls taken even 4 months away from the elections can be inaccurate. 

Given the fact that Warren has continuously told the public that she has no interest in running for the 2016 Presidential Elections, I feel as though Warren is a success but if she were to announce then she would have a mountain to climb. If she were to announce her candidacy for President, I feel as though her votes would increase significantly due to her official announcement.