A round-up of this morning's must-read stories.

THE RESULTS

Democrats
Texas (p): Clinton 51; Obama 48
Texas (c): Obama 52; Clinton 48 (with 35 percent counted)
Ohio: Clinton 54; Obama 44
Rhode Island: Clinton 58; Obama 40
Vermont: Obama 60; Clinton 38

Republicans
Texas: McCain 51; Huckabee 38; Paul 5
Ohio: McCain 60; Huckabee 31; Paul 5
Rhode Island: McCain 65; Huckabee 22; Paul 7
Vermont: McCain 72; Huckabee 14; Paul 7

Obama has won 26 contests and Clinton has won 17 ('contests' counts D.C., territories, Democrats Abroad).

Obama has won 23 actual states and she has won 16. 

BIG WINS IN TEXAS AND OHIO FOR CLINTON; MCCAIN IS IN AS GOP CHOICE
(Adam Nagourney, New York Times)
Mrs. Clinton also won Rhode Island, while Mr. Obama won in Vermont. But the results mean that Mrs. Clinton won the two states she most needed to keep her candidacy alive. Her victory in Texas was razor thin and came early Wednesday morning after most Americans had gone to bed. But by winning decisively in Ohio earlier in the night, Mrs. Clinton was able to deliver a televised victory speech in time for the late-night news. And the result there allowed her to cast Tuesday as the beginning of a comeback even though she stood a good chance of gaining no ground against Mr. Obama in the hunt for delegates.

HOW CLINTON WON TEXAS AND OHIO
(Jay Cost, RealClear Politics)
After the Wisconsin primary, there was evidence of pro-Obama momentum. There is no evidence of this from yesterday's two big contests in Ohio and Texas. In fact, Clinton not only regained ground she lost with her best groups, she made marked improvements among key portions of Obama's best groups.

SHE LIVES!
(John Dickerson, Slate)
Will any of the Clinton arguments work? We'll see in the coming days if hundreds of superdelegates allow the primary process to continue without continuing to move toward Obama. Clinton is pleading for time, arguing that voters should be allowed to have their say in future contests. But even in this she comes up against a contradiction posted by Obama's lead. Because she must rely on the superdelegates to beat back Obama's likely lead in the popular vote and among pledged delegates, she is essentially asking those superdelegates to listen to the people—but only long enough to be persuaded to vote for her. Then she expects them to undo the will of the people by voting against Obama in Denver. Clinton has rescued her campaign from free-fall, but the ride from here to the nomination is still going to be very bumpy.

MCCAIN'S REDEMPTION
(Nancy Benac and Liz Sidoti, Associated Press) 
Any other day, John McCain might have answered a reporter's question about campaign strategy straight on. Tuesday night, it was different. 'I've got to savor the moment,' the indefatigable warrior said as he at last laid claim to the Republican presidential nomination that had eluded him eight years ago. It was a sweet victory for McCain, a prisoner of war in Vietnam whose life story has had a remarkable rise-and-fall-and-rise-again rhythm to it. His quest for the presidency has been no different.

IN 2 BATTLEGROUNDS, VOTERS SAY NOT YET
(Patrick Healy, New York Times)
Clinton advisers said her decisive victory in Ohio and her narrow one in Texas — where exit polls showed her winning the votes of women, whites and Hispanics in an extremely close race — were more than enough to argue that she should go forward to the April 22 primary in the Ohio-esque Commonwealth of Pennsylvania, even if Mr. Obama has more delegates after Tuesday night. Mr. Obama, meanwhile, appeared likely to accumulate enough delegates from Texas and Ohio (as well as from his victory in Vermont) to strengthen his mathematical edge for the nomination and portray Mrs. Clinton as a spoiler to a unified party. Yet the results on Tuesday also bring fresh questions about his electability in crucial swing states like Ohio that Democrats are eager to carry in the November election.

OBAMA: IN THE WEEKS TO COME, A COSTLY BATTLE ON TWO FRONTS
(Jonathan Weisman and Shailagh Murray, Washington Post)
With losses in three out of four primaries yesterday, Sen. Barack Obama (D-Ill.) and his campaign face a scenario that a barrage of advertising, phone calls and door-knocking could not avert -- a protracted, two-front war against Sen. Hillary Rodham Clinton and the presumptive Republican nominee, Sen. John McCain. Even before the polls opened, campaign officials were dreading an outcome that would keep Clinton (D-N.Y.) in the race at least through the Pennsylvania primary on April 22. Those seven weeks will cost Obama at least $10 million, and possibly much more, campaign aides say, as he battles a rejuvenated Clinton who will have every incentive to try to force him into a major mistake.

CLINTON'S LESSON: ATTACKING OBAMA WORKS
(Ben Smith, Politico)
Clinton, too, is steering a course for sharpening conflict. If she has a path to victory at the Democratic National Convention in August, that path runs straight through Obama. Even under the most optimistic scenarios, she will trail among the delegates chosen by voters and caucus-goers. So she will have to prove to the party leaders known as superdelegates not just that she's a qualified contender -- but also that Obama is so weak, so risky, that the typically cautious superdelegates should overrule the pledged delegates. Clinton's lesson from Ohio and Texas is clear: Attacking Barack Obama directly works. Five days before the primary, she attacked his fitness to serve as Commander in Chief in a television advertisement depicting a late-night crisis at the Whtie House. In the same short period she attacked his credibility on promises to rein in free trade. And she beat him almost two-to-one among voters who decided in the last three days of the race, a group Obama has dominated in past votes. 

WITH MCCAIN ATOP TICKET, TALK SHIFTS TO SPOT NO. 2
(Michael Cooper, New York Times)
The choice of a running mate is always important, but it may be particularly so in Mr. McCain’s case, given that, at 71, he is seeking to become the oldest candidate ever elected to a first term as president. Several governors have been mentioned as potential running mates; their executive experience and ability to cast themselves as Washington outsiders are perceived as strengths. They include Tim Pawlenty of Minnesota, an early supporter; Charlie Crist of Florida, whose last-minute endorsement helped Mr. McCain win that crucial swing state’s primary; Jon Huntsman Jr. of Utah, an early supporter despite Mitt Romney’s popularity in his state; and Mark Sanford of South Carolina, whose conservative reputation could help Mr. McCain with the base but who did not endorse him... Two of his primary opponents — Mr. Romney and Mike Huckabee — also fall into the ex-governor category.