On Wednesday’s NewsHour…

PRIMARY WINNERS AND LOSERS | Outsiders and tea party backed candidates posted victories in key primaries around the country on Tuesday. Political editor David Chalian reviews the winners and losers.

WHAT DO PRIMARY RESULTS MEAN FOR MIDTERMS? | A roundtable of political strategists dive into what the primary results could mean for Republicans, Democrats and who will control Congress.

MEXICAN AMBASSADOR TALKS ABOUT THE WAR ON DRUGS | Mexican Ambassador Arturo Sarukhan talks with Ray Suarez about Mexico’s bicentennial amid the backdrop of ongoing drug war violence.

THE DRUG WAR AND BAJA’S ECONOMY | A drop in tourism and manufacturing has left the Mexican state Baja, California, with a struggling economy. Jose Luis Sierra of New America Media reports on how the drug war and recession have played a role.

PAKISTAN FLOODS | The U.S. is said to be the leading donor in the Pakistan floods for humanitarian aid. But militant groups are also stepping up their efforts. Suzanna Koster of GlobalPost reports from a town in Punjab.

THE SECRET LIFE OF A CIVIL RIGHTS PHOTOGRAPHER | Ernest Withers, a famed Civil Rights photographer during the 50’s and 60’s, may have been pulling double duty for the FBI as a paid informant. Margaret Warner talks to veteran journalist Earl Caldwell for more.

Wednesday’s anchors are Gwen Ifill and Jeffrey Brown. Hari Sreenivasan has the day’s other top news stories and look at the web features. Here on the Rundown, Jose Luis Sierra from New America Media reports on how residents of Tijuana are defending the safety of their city. Also, Education Correspondent John Merrow examines what Washington, D.C., Mayor Adrian Fenty’s failed re-election means for the overhaul of the city’s schools. Plus, we talk to Twitter CEO Evan Williams about the site’s new design and the quickly changing pace of social media.

We hope you’ll join us.