(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * Biden takes narrow lead in key states of Georgia, Pennsylvania * Tech heavyweights slip after sharp weekly gains * S&P 500, Nasdaq track best week since April * Indexes off: Dow 0.31%, S&P 0.16%, Nasdaq 0.21% (Updates to early afternoon) Nov 6 (Reuters) - Wall Street’s main indexes took a breather on Friday after sharp gains this week as Democrat Joe Biden edged closer to victory in a nail-biting election, while the monthly jobs report underlined the economic challenge facing America’s next president. Biden took the lead over President Donald Trump in the battleground states of Pennsylvania and Georgia, putting him on the verge of winning the White House hours after Trump falsely claimed the election was being “stolen” from him. “Markets have been pretty comfortable with that idea (of a Biden win), but if it’s contested, it adds a little bit of uncertainty,” said Scott Brown, chief economist at Raymond James in St. Petersburg, Florida. “Even with these states being really close, we might have to go back and recount, so we’re in for a long period of uncertainty.” Despite Friday’s losses, the benchmark S&P 500 and tech-heavy Nasdaq were on track for their best week since April as the prospect of a policy gridlock in Washington eased worries about tighter regulations on U.S. companies. Republicans could keep control of the U.S. Senate pending the outcome of four undecided races and they would likely block large parts of Biden’s legislative agenda, including expanding healthcare and fighting climate change. Meanwhile, the government’s closely watched report showed unemployment dropped sharply to 6.9% last month from 7.7% in September, but job recovery slowed as fiscal support ebbed and daily coronavirus cases surged. “Despite a shorter-term rally, ultimately we’re going to see some real challenges in payrolls and the economy,” said Phil Toews, chief executive officer and portfolio manager for Toews Corp in New York. “The most leading indicator is the number of (COVID-19) cases, hospitalizations, and number of deaths in the country and that is going in the completely wrong direction.” At 12:36 p.m. ET the Dow Jones Industrial Average fell 0.31% to 28,299.98, the S&P 500 lost 0.16% to 3,504.79 and the Nasdaq Composite slipped 0.21% to 11,866.16. Technology mega-caps including Apple Inc, Amazon.com Inc, Microsoft Corp and Facebook Inc fell after logging strong gains this week and were among the biggest drags on the benchmark S&P 500. Coty Inc jumped 15% as the cosmetics maker beat analysts’ estimates for quarterly revenue, while T-Mobile US Inc gained 6.1% after adding more phone subscribers than analysts had expected in the third quarter. Electronic Arts Inc slumped 7.8% after the video game maker fell short of quarterly sales estimates. Declining issues outnumbered advancers by 1.42-to-1 on the NYSE and 1.59-to-1 on the Nasdaq. The S&P index recorded 40 new 52-week highs and no new low, while the Nasdaq recorded 168 new highs and 22 new lows.