Hmmm. Gallup informs us:
The advantage in public support the Democratic Party built up during the latter part of the Bush administration and the early part of the Obama administration has all but disappeared. During the first quarter of 2010, 46 percent of Americans identified as Democrats or leaned Democratic, while 45 percent identified as or leaned Republican.
Apparently the movement includes little or no increase in the number of self-identified Republicans and is almost entirely among independents describing themselves as leaning towards the Republicans.