NEW YORK In a (perhaps) historic shift, more Americans now consider themselves Democrats than Republicans, the Gallup organization revealed today. Republicans had gained the upper hand in recent years, but 33% of Americans, in the latest Gallup poll, now call themselves Democrats, with those favoring the GOP one point behind. But Gallup says this widens a bit more ‘once the leanings of Independents are taken into account.’ Independents now make up 34% of the population. When asked if they lean in a certain direction, their answers pushed the Democrat numbers to 49% with Republicans at 42%. One year ago, the parties were dead even at 46% each. This shift indicates, Gallup says, why its polls show Democrats leading in this year’s congressional races. The latest poll was taken from January to March 2006, with a national sample of about 1,000 adults.