Grass-Roots Politics With Click of a Mouse As the election season reaches its peak, Silicon Valley is trying to change politics by harnessing the Internet's ability to take advantage of and grow social networks from the bottom up. &lt;br&gt;&lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2"\ color="#666666"&gt;&lt;B&gt;-The Washington Post&lt;/B&gt;&lt;/FONT&gt;