In the case of Town of Weyauwega v. Ayling, the Supreme Court of the United States was asked to decide whether a Wisconsin statute that allowed a municipality to issue bonds to pay for the construction of a railroad was constitutional. The Court held that the statute was constitutional, as it did not violate the Contract Clause of the United States Constitution. The case arose when the Town of Weyauwega, Wisconsin, issued bonds to finance the construction of a railroad. The bonds were issued pursuant to a Wisconsin statute that allowed municipalities to issue bonds for the purpose of constructing railroads. The bonds were purchased by Ayling, who then brought suit against the Town, arguing that the statute was unconstitutional because it violated the Contract Clause of the United States Constitution. The Court held that the statute was constitutional, as it did not violate the Contract Clause. The Court noted that the statute did not impair any existing contracts, and that it was a valid exercise of the state's police power. The Court also noted that the statute was a valid exercise of the state's power to promote the public welfare. In conclusion, the Supreme Court held that the Wisconsin statute allowing municipalities to issue bonds to finance the construction of railroads was constitutional, as it did not violate the Contract Clause of the United States Constitution. The Court noted that the statute was a valid exercise of the state's police power and power to promote the public welfare.

In the case of Town of Weyauwega v. Ayling, the Supreme Court was tasked with determining whether a Wisconsin statute that allowed municipalities to issue bonds for public works projects without voter approval violated Article I Section 10 Clause 1 of the United States Constitution, which prohibits states from passing any law impairing contracts. The majority opinion held that since no contract had been formed between the municipality and bondholders prior to passage of this statute, it did not violate Article I Section 10 Clause 1. However, Justice Field dissented on this point and argued that although there was no formal contract between these parties at present, such an agreement could be implied in future transactions if bondholders were willing to purchase bonds issued by municipalities under this new law. He further argued that even though there may have been some uncertainty as to what terms would be included in such a potential contract due to lack of specificity in the legislation itself, it still constituted an impairment because it created doubt about how much money would ultimately be paid out by municipal governments when issuing bonds under its authority. Thus he concluded that despite its seemingly innocuous nature on its face value, this particular piece of legislation should still be found unconstitutional because it impaired existing contractual obligations or expectations regarding future ones.