Sometimes it is useful to mention your supporting points in your thesis. When you make a subjective judgment call, specify and justify your reasoning. Does your thesis include a comment about your position on the issue at hand? It can direct your research and your argument so that your essay is tight, focused, and makes readers think.
Original thesis: Hoover's administration was rocked by scandal.
How to check? You should support your thesis statement with detailed supporting evidence will interest your readers and motivate them to continue reading the paper.
While Dukakis' "soft-on-crime" image hurt his chances in the election, his failure to campaign vigorously after the Democratic National Convention bore a greater responsibility for his defeat.
Expository: Is there only one way to write a great thesis statement?