Martin Heinrich leads a new Democratic primary poll in the open New Mexico Senate race, Jim DeMint balks at Mitt Romney’s health care bill, and Marco Rubio calls Democrats “socialist.”

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EARLIER ON THE FIX:

The misappropriation of the tea party label (and the headaches it’s causing)

Buddy Roemer — The quixotic candidate?

The political dangers of waiting on the budget

WHAT YOU MIGHT HAVE MISSED:

* A new Tulchin Research poll for the Defenders of Wildlife Action Fund shows Rep. Martin Heinrich leading a Democratic primary for retiring Sen. Jeff Bingaman’s (D-N.M.) seat. Heinrich is at 32 and leads former Lt. Gov. Diane Denish (25 percent), Rep. Ben Ray Lujan (15 percent) and state Auditor Hector Balderas (5 percent).

* A source close to Sen. Jim DeMint (R-S.C.) says the tea party leader would not support Mitt Romney for president unless Romney repudiated the health care law he signed as governor of Massachusetts. DeMint previously said Democrats “hijacked” Romney’s health care bill.

* Sen. Marco Rubio (R-Fla.) calls Democrats “socialist” in a fundraising e-mail for the Republican National Committee.

* Donald Trump says he would spend $600 million of his own money on a presidential campaign. He is also flirting with birtherism.

* The new GOP redistricting mantra: don’t get greedy.

WHAT YOU SHOULDN’T MISS:

* South Carolina is no longer the place where insurgent presidential candidates go to die.

* Rep. Dennis Kucinich (D-Ohio) has introduced a bill to end the war in Afghanistan.

* The National Journal will be hosting a conversation with Gen. David Petraeus Friday at 9 a.m. at the Newseum.

* Also Friday, former House speaker Newt Gingrich speaks about President Obama’s health care bill at the National Press Club at 10 a.m.

* Meet the creator of former Minnesota governor Tim Pawlenty’s (R) epic campaign videos – 23-year-old, Canadian, former Hillary Clinton supporter Lucas Baiano.

THE FIX MIX:

Happy St. Patrick’s Day.

With Aaron Blake