This Bloody Mary served at the Nationals Park in D.C. came with a meat straw, which infuses each sip with an umami flavor. Ben Hirko first came up with the concept while tending bar one snowy night in 2009. The straws have become a hit. Tamara Keith/NPR hide caption

Tamara Keith
Tamara Keith covers business for NPR.President Obama has stayed neutral in the race to replace him, but as rumors swirl that Vice President Biden could jump in, a White House spokesman said Monday it's possible Obama will endorse. Saul Loeb/AFP/Getty Images hide caption
Students protest the rising costs of college loans in Los Angeles in 2012. Citing bank bailouts, the protesters called for student debt cancellations. David McNew/Getty Images hide caption
At Hillary Clinton's event, Carl Babbitt raised his hand high until Clinton called on him to tell his story. Here, Babbitt holds two photos of himself — one from when he was 29, in prison serving time for murder. Tamara Keith/NPR hide caption
Hillary Clinton has already turned over 30,000 emails. Jae C. Hong/AP hide caption
Clinton Team To Release Private Email Server She Used As Secretary Of State
Hillary Clinton Decides To Release Private Email Server To Justice Department
The Clinton campaign's debate watch war room was actually just a conference room with a big-screen TV at the front. Fifteen or so staffers huddled over their laptops ready to pounce. Tamara Keith/NPR hide caption
Inside Hillary Clinton's Debate Watch War Room
With Climate Change Plans, Democratic Candidates Aren't Just Courting Voters
Democratic presidential candidate Hillary Clinton steps onstage before speaking at Trident Technical College during a campaign stop on June 17 in North Charleston, S.C. David Goldman/AP hide caption
Black Lives Matter activists confronted Democratic candidates Martin O'Malley and Bernie Sanders at a Netroots Nation event earlier this month. O'Malley used the phrase "all lives matter" twice, which he later apologized for. Ross D. Franklin/AP hide caption