While the evidence shows instances of Democrats opposing Trump's policies (e.g., Ilhan Omar shouting at him, criticism of his projects), the evidence does not support the sweeping generalization that Democrats have *defined themselves* by opposing *everything* he supports throughout his entire time in office. The evidence is selective and presents a pattern of opposition rather than a definition of the entire Democratic platform.

The claim suggests a blanket opposition to *any* issue Trump supports. While some sources mention Democrats opposing his attacks (e.g., on Venezuela), other sources suggest Democrats sometimes support policies separate from Trump's name. The evidence points to political disagreement on specific issues rather than a universal opposition to everything he supports.