It’s Republican debate day in Boulder, Colo., where 14 candidates will face off in two panels for the third time this cycle. Hosted by CNBC, the event is billed as the “Your Money, Your Vote” debate, but everything is on the table. The two-hour main contest comes as Ben Carson may be unseating Donald Trump at the top of the polls, and as their rivals struggle to gain attention in their presence. For many candidates, the issues-focused debate offers opportunities—allowing them to demonstrate seriousness on the issues most important to voters. For others, who have been short on policy specifics and heavy on bluster, there may be pitfalls as moderators promise to look for substance over sound bites. Here’s what to watch for at tonight’s debate.

One of Florida’s largest newspapers is calling on Marco Rubio to resign his seat in the Senate as he carries on his presidential campaign, citing his poor attendance and voting record, and well-documented distaste for the job. Rubio has struggled to defend his absence from Washington as he runs for president, offering differing explanations ranging from “votes don’t matter” to he “gets briefed by staff.” The scathing editorial is not what Rubio was hoping to read as he prepares for a break-out moment in the race.

John Kasich is dropping his nice-guy demeanor, telling an audience in Ohio before departing for Colorado Tuesday that he is “fed up” with the tone of the conversation in the Republican race and promising to speak his mind. The move indicates that Kasich, who has cast himself as the sober optimist in the race, is changing his strategy as he has failed to move up in the polls.

Latino Republican leaders say they are done with Trump and are threatening to abandon other candidates if they don’t reverse course on policies they deem anti-immigrant. A group of influential Hispanic activists met in Boulder Tuesday, where they warned candidates who embrace Trump’s ideas—from deporting all those in the U.S. illegally to eliminating birthright citizenship—that they will be unelectable if they don’t change their policies.

Hillary Clinton is out with four new ads just in time for tonight’s debate. Carly Fiorina is still doing paid speeches. Lindsey Graham plays “Date, marry, make disappear.” And an early look at Trump’s new book.

Here are your must-reads:

Must Reads

What to Watch For At the CNBC Republican Debate

The third contest stands to be the most important yet [TIME]

Latino Republicans Write Off Trump, Send Warning To Cruz

In meeting before debate, leaders call on GOP not to take Hispanic vote for granted [TIME]

Obama Pushes for Justice, Gun Reform During Police Conference Speech

TIME’s Maya Rhodan on Obama’s call for unity between police and the communities they serve

Donald Trump’s Saturday Night Live Protests Grow

Pressure builds on the network that previously broke ties with Trump, TIME’s Tessa Berenson reports

Bernie Sanders Walking the Line Between Personal Attacks and Political Critiques

His campaign tests out Clinton critiques [New York Times]

Sound Off

“They have to know that yes they will fail. If they are too big to fail then they may have to be broken up.” — Hillary Clinton on big banks in an interview on the Late Show with Stephen Colbert Tuesday

“I’m sticking with you people… Now if I lose Iowa, I will never speak to you people again.” — Donald Trump in Iowa Tuesday reflecting on his fall from first place in the polls in the early state

Bits and Bites

Republican Super PACs Dominate Early Ad Spending [Center for Public Integrity]

Hillary Clinton Champions Working Women in New Ads [TIME]

House Speaker Job Requires Many Hats Paul Ryan Has Never Worn [New York Times]

Rand Paul Will Filibuster Debt Ceiling Bill [Washington Post]

CNN Host Asks Lindsey Graham About Hillary Clinton During ‘Date, Marry, Make Disappear’ Bar Game [Washington Post]

House Committee Chairman Moves to Impeach IRS Chief John Koskinen [Associated Press]

Donald Trump Says He Can Make America Great Again—With Golf Clubs [TIME]

Carly Fiorina, Presidential Candidate, Available for Paid Speeches [Wall Street Journal]

Kasich at debate send-off rally: ‘I’m done being polite’ [Columbus Dispatch]

New GOP Groups Taking Aim at Hillary Clinton [Wall Street Journal]

Campaigns Erupt Over Greenrooms at Third GOP Debate [Politico]

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