This Tuesday was supposed to be a big showdown in the Republican presidential nomination struggle, a titanic clash between economic and social conservatives that had all the elements of a breathtaking Pennsylvania primary.
It was going to be a riveting confrontation featuring an insurgent and spurned native son against a party regular struggling to regain the sense of inevitability he thought was his birthright. Instead, it's the biggest dud since the Y2K scare.
The contest once known as Rick Santorum vs. Mitt Romney is over. Mr. Romney is now all but certain to become the Republican nominee in Tampa in August. But that doesn't mean Mr. Romney's struggles are over. In the next four months, he still has to fight four battles:
Romney vs. the House GOP
One of the oddities of American politics is that Democrats and Republicans are each two parties, a presidential party and a congressional party. This is always more evident when a party is out of the White House, as Republicans are today. There is almost as big a chasm between Mr. Romney and House Republicans as there is between Republicans and Democrats on Capitol Hill, where the two warring sides at least have a shared experience and a shared argot.
The presumptive nominee already finds himself pressured by his putative allies on Capitol Hill. It comes in the form of impertinent remarks by freshmen lawmakers who were elected in districts of fewer than 700,000 people and have served in the House for fewer than 16 months.
Just the other day, a freshman Republican from Louisiana, Rep. Jeff Landry, asserted that he and his allies, not the likely GOP nominee, were the conductors of the Republican railroad -- not necessarily the most felicitous legislative metaphor on offer in the Capitol. "We're supposed to drive the train," he said.
Imagine the young Lyndon Johnson, elected to the House in 1937, telling Franklin Roosevelt that the president was the porter and that he, Rep. L.B. Johnson of the 10th congressional district of Texas, was the conductor. At age 46, Mr. Johnson, the youngest Senate majority leader ever, began to emerge as a congressional tyrant, perhaps its greatest autocrat ever. At age 29, however, as a freshman member of Congress, Mr. Johnson was the sycophant's sycophant -- sickeningly so.
This phenomenon, a restive Republican congressional fifth column, is big trouble for Mr. Romney as a nominee. It is potentially calamitous if he is elected president.
Romney vs. the Santorum rump
They're still there, the people who gave Mr. Santorum 11 state primary victories, more than half as many as Mr. Romney won. They still believe that Mr. Romney is a poseur, that he is not a genuine conservative, that he has no interest in, nor voice for, the social issues that propelled them into politics, that he is inauthentic and an opportunist. These things aren't said by his general-election opponents, but by the people he will need in the November election.
The challenge Gov. Michael Dukakis of Massachusetts faced in 1988 of romancing the Rev. Jesse Jackson's supporters was far less formidable than the one his gubernatorial successor faces in romancing the stone of the Santorum conservatives. Mr. Dukakis and Mr. Jackson disagreed on little, and didn't even have discernible differences in emphasis. They simply attracted different groups of broadly liberal supporters who opposed Reagan-era economic and foreign policies.
Even with that advantage over Mr. Romney, and facing the weakest Republican nominee in 12 years, Mr. Dukakis still lost 40 states to George H.W. Bush.
Romney vs. complacency
Mr. Romney has accomplished his heart's desire, or at least part of it -- a straight shot to the Republican presidential nomination that was his father's fondest, but ultimately unrequited, desire. Nobody except former House Speaker Newt Gingrich thinks he has any real opponents left, and maybe even Mr. Gingrich couldn't pass a lie detector test on that question.
Mr. Romney's greatest opponent now is himself. He is, to be sure, no shirker. But the interregnum between April and August is full of danger. It is a vacuum that Mr. Romney, who has no title and no job, must seek to fill in a positive way. It's harder to do than it looks.
Romney vs. Barack Obama
This battle already has started, first on taxes, then on the question of stay-at-home-moms and working women. There is a geographical component as well. Both camps are establishing ground games for November.
The flurry around the notion that Mr. Obama thinks he has a shot in Arizona symbolizes this new phase in the campaign -- and the broader field on which it will be played. The Democrats have won Arizona only once since 1948 -- and then, in 1996, by only about two percentage points.
Not that it matters. If the Obama team decides to play in Arizona, investing staffers and advertising resources in a state where almost every indicator favors his opponent, Mr. Romney will have to move campaign assets into a state where the Republican victory margin has averaged 167,495 votes in the past three elections.
Feints matter as much as offensives in presidential politics. And in Mr. Romney's case, he is facing four challenges rather than one. He must win the first three if he is to prevail in the final one.
David Shribman is executive editor of the Pittsburgh Post-Gazette.
Contact him at: firstname.lastname@example.org