Typically, he has responded to Mr Tatad's accusations by challenging him to a fistfight.
Challenging him for the same voters is Pyotr Pimashkov, a local party hack, and mayor of the capital.
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There were also rumors Christie would consider Booker, since the Democrat took a pass on challenging him for governor this year.
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Mr Carswell has written to the prime minister, challenging him and frontbenchers of all sides to support his Ten Minute Rule Bill.
That year, someone mailed Hotz a PlayStation 3 video-game system, challenging him to be the first in the world to crack it.
As Australia's film-makers were challenging him, its historians were embroiled in a parallel controversy over the truth about violence in Australia's frontier history.
Challenging him is Elizabeth Warren, a liberal Harvard professor known in Washington for designing a new consumer protection law and for the rage she provokes among conservatives.
He hasn't spent so much money in the five years he's here and we're always challenging him, playing some great football and he knows a good player when he sees one.
In one dramatic case online journalists have aired a litany of corruption allegations against Moncef Belkhayat, the minister of youth and sports, challenging him to answer questions about the dispensing of government contracts.
"I thought that we let a player that wasn't very dangerous not because he's not talented or anything but a player in a situation that wasn't very dangerous skate into a primary scoring spot without even challenging him, " McLellan said.
Blackburn then did exactly what we would expect of an important, nationally known GOP leader in the United States Congress she looked into the camera and made Hulk Hogan proud as she called out the President of the United States, challenging him to a skeet shooting smackdown while assuring us she would be the one emerging victorious.
Al-Attiyah felt the longest stage of the race, had been particularly challenging for him and prevented him from further closing the gap on Sainz.
But Bonaparte said he and Lee "determined that with the vote of no confidence, it would be very challenging for him to continue as the police chief" and worked out a severance plan.
Taking his lead from the likes of Steve Stricker, Jim Furyk and David Toms, Snedeker honed his game to ensure distance wasn't preventing him challenging for big titles.
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He will need as few impediments as possible once Mr Kohl starts bearing down on him, challenging his reliability and sincerity.
"It's very challenging to work with him, but he loves to give credit" the upcoming Valentino show at Somerset House being a case in point.
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Ask Al Gore to participate in a global warming debate, or even field a few challenging questions, and watch him launch into a profanity-filled tirade.
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This experience has been frustrating and challenging but also good for him because it's real life - he will get injuries during his career and have to deal with them.
Benin suffered a blow on 25 minutes when playmaker Sessegnon attracted his second yellow card of the tournament for challenging the referee, ruling him out of their crucial last group game with Egypt on Wednesday.
The only sour note of the first 45 minutes was the booking of Gabriel Agbonlahor for using an arm when challenging aerially with Bjarsmyr, ruling him out of the final.
Woods plays the big brother, challenging McIlroy to be as good as him.
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Winston said that challenging Specter with the hopes of defeating him -- a decidedly more conservative opponent was running against him in the GOP primary in Pennsylvania -- has been a strategy employed by conservatives over the years.
The man, known as Z, is challenging restraint methods he fears could be used on him if he is forcibly removed from the country.
In a recent news conference, Mr. Li reflected on the challenging business environment that Hong Kong at times presented for him.
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He is famous for challenging golfers to make smart, precise shots which earned him a devilish reputation among Professional Golfers Association (PGA) pros.
Guerra was replaced as judge on the case and then removed from the court in 2008, in what he described as retribution for challenging pro-plaintiff rulings by the judges who succeeded him, including the appointment of Richard Cabrera, a plaintiff scientific effort, to assess the evidence .
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Now, like his father and his grandfather before him, the Prime Minister is leading Greece through challenging times.
Paying tribute to Dr Williams, Archbishop of York John Sentamu described him as a "remarkable leader" who had presided over a challenging time for the Church.
Mr Carney also said that President Obama had telephoned Mr Sarkozy to thank him for his "strong leadership and for his friendship and partnership in challenging times".
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Mr Arafat once more faces the desperate choice of either violently challenging his Islamist dissidents or being stunned by the military solutions Israel has in store for him.
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