The STEM field has contributed significantly to the development of society because its findings result in new technology, which gives people more efficient tools and methods for a better standard of living. Postsecondary institutions have trained STEM field graduates through advanced curricula and learning environments. Compared to other academic fields, STEM requires more monetary support for research from the institution or the government because STEM research often requires expensive equipment installation or the introduction of new technologies. This paper overviews institutional support for STEM education and research by the regime of recent U.S. governments and examines the characteristics of R&D (research and development) expenditure. The results indicate that the R&D expenditures of the STEM field show continuous support for the different type of institutions, regardless of governments over time. However, they have tried to diversify the R&D investment by the type of R&D field and institutional type. Even though the government has tried to increase the total size of R&D expenditure through various resources, they still need to consider the equity and diversity issues for even further R&D investment strategies. A further research direction would search for the detailed action and strategies to support the STEM field according to their types of support or expectation.