Should he run for president, Walker would face a field of challengers that could include Sens.
Now his party is considered one of the three main challengers in the upcoming election.
One of Nadal's main rivals, his compatriot David Ferrer, knows the task facing the challengers.
He surged in the last few weeks before the primary and he decisively beat those challengers.
That does not stop sniping from the Liberal Democrats, who are her main challengers.
Challengers will be coming at them faster than ever, and from every possible direction.
The opinion polls say that the incumbent has a solid lead over all his challengers.
And he is considered a real threat to Armey as well as his challengers.
LoBiondo received nearly 80 percent of the primary vote, with his two challengers splitting the remainder.
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He also suggested that Pietersen may be a candidate for captaining the Royal Challengers.
Daley was elected to his fifth consecutive term Tuesday, defeating three challengers by an overwhelming margin.
Germain could leave the Ligue 1 title challengers in difficulty if the situation mirrors Manchester City.
The real divide is less, the challengers say, toadies versus trouble-makers, or loyalists against usual suspects.
When certain members of his own party balked, he supported their challengers in the primaries.
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One of Mrs Arroyo's strongest challengers in the coming presidential election is Fernando Poe.
The practical deadline for prospective challengers to run in the 1998 elections has come and gone.
Though as passionate as the band's earlier work, Challengers feels slightly more wistful and melancholic.
They also fear that American Jews will vote for Republican challengers in large numbers.
Challengers must drive over an independently measured mile in one direction and return within an hour.
Even for challengers with deep-pocketed governments to support them, that is quite some barrier to entry.
The lack of a clear consensus candidate has raised the hopes of numerous challengers.
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By scrapping red tape for small players they can become serious challengers and help keep bills down.
One reason for the plethora of challengers is that Mr Bercow lacks support within his own party.
His first scheduled game is on 11 April for the Chennai Super Kings against Bangalore Royal Challengers.
If we are to believe them, then Accountability Now PAC will only back credible challengers in 2010.
Branagh's challengers are Jonah Hill (Moneyball), Nick Nolte (Warrior), Max von Sydow (Extremely Loud And Incredibly Close).
Expect potential challengers to start laying out their stalls in a not-so-subtle way in the coming days.
They won 13 of their 18 games and were 12 points ahead of their nearest challengers, Ecuador.
Honda is hamstrung on responding to challengers because the vehicle barely breaks even at current exchange rates.
The GE report should be read alongside one from Boston Consulting Group on the new challengers.
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