Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
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 The front-runner crushed Rick Santorum in Illinois, a win that might swing the narrative toward Romney after a topsy-turvy primary fight. 
  
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 reset Romney celebrates Illinois win Santorum speaks after loss 
  
 Below, POLITICO’s five takeaways from a state primary that was essentially a two-man race: 
  
 1) Mitt Romney is looking toward the fall 
  
 The former Massachusetts governor had a big, double-digit win in a big Midwestern state. He’ll pick up the bulk of delegates, and not just because Rick Santorum forfeited a chunk of them. 
  
 Little changed for Romney in terms of the ultimate delegate math — he won roughly what he was expected to, and his path forward remains about the same as where it was. He needs to win just south of 50 percent of the remaining delegates to get the GOP nomination. His win was not a knockout, and Santorum — as well as Newt Gingrich and Ron Paul — will keep going. 
  
 Even so, this was an important pivot point for Romney, who seemed noticeably more at ease in an election night speech that made no mention of his rivals and that sounded much more like a general-election message than the ones he’s delivered on past primary nights. 
  
 He did not suggest, as his wife did earlier this week, that it’s time for the party to “coalesce.” And his team seems to have learned from past errors about setting expectations. Instead, Romney trained his sights on President Barack Obama, saying — albeit with a brief teleprompter hiccup — that it’s time for the country to say, “Enough!” 
  
 Talking openly about the inevitability of his delegate math has not been not a winner for Romney. But conveying an aura of inevitability by projecting the confidence and message of a presumptive nominee could prove to be, especially with some rough states ahead in May. Few Republicans want to call the race over, especially with the base of the party continuing to vote against the front-runner. 
  
 The media also seem unlikely to bite on the notion that it’s over. But a number of Republicans are privately saying they see it that way, and if that impacts Santorum’s ability to deliver his message, it could matter. 
  
 Winning nearly 50 percent of the vote in a four-way race (even with two people who were barely factors) is a big deal for a candidate who has struggled. And to the extent that the campaign has been far more about perception than reality, having a clean win in a state where Santorum needed to prove himself could do a lot for Romney as he moves forward. 
  
 2) Santorum fights on 
  
 His path has narrowed, and there is a sense that last night might have been the beginning of the end in terms of a route that keeps Romney from getting to 1,144 delegates by the end of June and halts the perception that the primary is being wrapped up. The former Pennsylvania senator hurt himself with an ill-advised stop in Puerto Rico and a gaffe about the unemployment rate that forced him into a defensive crouch once again. ||||| Mitt Romney won a solid victory last night in the Land of Lincoln. Let’s take a close look at how he pulled it off. 
  
 Throughout this primary battle, we have seen political divisions along some pretty straightforward demographic and ideological lines. Mitt Romney has typically done well with urban and suburban voters, as well as socioeconomically upscale voters (i.e. those who have college degrees and make more than $50,000 a year). On the other hand, Newt Gingrich or Rick Santorum have typically had an advantage among rural voters, socioeconomically downscale voters, and very conservative voters. Layered atop this, Romney has done better in primaries than in caucuses, and in the North than the South. 
  
 So, in many respects, Illinois was thus “bound�? to favor him. It is a Northern primary state with a favorable demographic mix for the former Massachusetts governor. To appreciate the latter point, consider this comparison between Illinois, Michigan, and Ohio along key demographic lines. 
  
 This clearly suggests that the Illinois primary sampled more heavily from core Romney groups. This is a consequence of the metro Chicago vote. Romney won the Cook County suburbs as well as the collar counties by 20 points, where these sorts of voters are numerous. He also won the smaller cities in the state – Champaign, Peoria, and Springfield. 
  
 When we break it down, we see Romney actually did about as well with his core voters in Illinois as he did in Michigan and Ohio. In other words, the magnitude of his victory was not because of any major shift in his direction, but because his voters were simply more numerous. |||||
Solution:
Mitt Romney's decisive win in Illinois extends his delegate lead, but it's not enough to change the dynamics of the race, let alone knock out Rick Santorum, pundits say. Romney has scored another big win in a Midwestern state, but even his "staunchest allies don’t expect him to pick up enough momentum" to win Louisiana on Saturday, "meaning the 'Romney can’t win the South' and 'Romney can’t win conservatives over' storylines" will linger into April, writes Chris Cillizza at the Washington Post. Neither Romney nor Santorum managed to expand their voter base in Illinois, and the low turnout will add fuel to arguments that Romney can't excite voters, notes Maggie Haberman at Politico. Santorum's speech "was a strong reminder of why he resonates with a base that has shown it wants the race to keep going," she writes. "In fact, more than two-thirds of voters in the Illinois exits said they want the primary to plow forward." Romney did well with his core voters but he didn't flip many of Santorum's supporters, and the results show he still faces "sustained opposition from a sizeable bloc of Republicans: the rural vote, the socio-economically downscale, and the very conservative," writes Jay Cost at the Weekly Standard. The demographics mean that Pennsylvania's April 24 primary is a good opportunity for Mitt to finish off Santorum with a win in his home state, Cost writes, but if Romney can't pull that off, expect the race to drag on into June.