Traders work on the floor of the New York Stock Exchange.NYSEStocks exit 2020 with strong gains and are riding a tailwind, but already in the dawn of the new year, the market could face its first big challenge.The final outcome of the 2020 election plays out Tuesday, when voters in Georgia will pick their senators and decide which party controls the U.S. Senate.With President-elect Joe Biden heading to the White House and a Democratic-controlled House of Representatives, Wall Street has been comfortable with the view that Biden and the Democrats could not succeed with tax hikes and more …
