In a Wall Street Journal interview, Jeb Bush continued attacking Marco Rubio, stating that he is fair game. Despite a long relationship as colleagues in Florida, the former governor and his campaign apparatus have followed up on attempts in the last debate to discredit Rubio and attack his U.S. Senate attendance record.

Without being aware of it, some billboards and advertisements track the facial reactions of passers-by allowing advertisers to tweak the wording or image of ads to receive the desired emotion. Neuromarketing and its budding cousin, Neuropolitics, may be making its way into the trove of tools presidential campaigns' use to help secure a win.

In a Wednesday interview with The Wall Street Journal, Sen. Bernie Sanders amplified his criticisms of Hillary Clinton. Noting her past policy reversals and changing his tone on her email scandal, the Vermont senator is ramping up his attacks three months shy of the first primaries. Summing up his criticism, he said: “I have been walking the walk, not just talking the talk.”

Having fallen behind Ben Carson in recent polls, Donald Trump is preceding his appearance on SNL with new ad spots.

Hillary Clinton has replaced Bernie Sanders at the top of the most recent Monmouth University New Hampshire poll released yesterday.

Ted Cruz may not have the bulk of the millennial demographic in his corner but his social media strategy is on point.

The Bernie Sanders campaign airs its first TV ad in Iowa and New Hampshire today. The ad buy is over $2 million and the campaign expects to take it to other states moving forward. The spot highlights his work in Congress, noting that his campaign is “funded by over a million contributions.”

Following a difficult night for CNBC anchors who faced Republican candidates’ wrath during and after the most recent debate, 13 leading presidential campaigns have drafted a letter with demands for how subsequent debates should be run. The RNC itself is also facing criticism for its handling of the pre-debate negotiations. Some campaigns have proposed circumventing the RNC all together going forward.

Nate Silver’s FiveThirtyEight will partner with NPR’s "On the Media" through the 2016 election. The central question they will be addressing: “How does the media narrative stack up against what we know to actually be true?” Combing through false narratives and looking at the involved relationship between politics and the media, the partnership offers an opportunity for in-depth analyses of how media affects campaigns. Nate Silver kick-started the relationship with a conversation with On the Media about whether increased media coverage results in higher poll numbers, or if success in the polls precedes rising media coverage.

Both Cuban-American and both 44, Sens. Rubio and Cruz have emerged as strong candidates in the Republican primary race. They both rode the Tea Party wave into the Senate:  Rubio in the 2010 and Cruz in the 2012 election cycles. Now, they being crowded out in the polls by non-politicians Trump and Carson. Many Republican insiders see the senators as the strongest GOP candidates in a general election (particularly Rubio). In private conversations with colleagues, Sen. Cruz has said that “he believes the race for the party’s nomination will boil down to a contest between himself and Mr. Rubio.”