They'd be smarter to focus their demonstration on "Lets turn out the vote and elect Democrats to the House and Senate 2 years from now, and then turn out for the next presidential vote"
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When you read that the demonstrations are about LGBT, Black lives matter, obscure splinter-offshoots of feminism, day care, anti-pipeline, native Americans, and every bandwagon-jumping group there is....it dilutes the protest.  A protest about every issue is a protest about no issue.