Because entrepreneurs and small business owners is not a desired or targeted demographics by the Democrats anymore. Even though these groups provide a disproportionately large economic growth contribution, the number of votes the Democrats can realistically gather from them is relatively small. They target the lowest 30% and the salaried employees with their policy.
Very short-sighted thinking. Most multinationals were started by entrepreneurs, some even bear their names: e.g. Boeing, Ford, Dell, Bristol-Myers-Squibb. If you create a start-up unfriendly regime ( like in EU currently), they don't get started. Out of 1000 startups one becomes Boeing and 20 become sustainable medium size businesses that can be discarded for the microeconomic estimates.