Voters who consider themselves Democrats outnumbered Republicans by 41.1 percent to 32.1 percent in March, according a Rasmussen Reports survey. Last December, the Democratic number had stood at 36.1 percent. Rasmussen said that Democratic gains were particularly marked among women who broke 46 percent to 30 percent for the Democrats. Democrats were about even with Republicans among men, edging the GOP by 36 percent to 34 percent. The Democrats’ advantage was also documented in a Pew Research survey last month.