In Walker v. The Transportation Company, the Supreme Court of the United States considered whether a contract between two parties was valid and enforceable under state law. At issue in this case was an agreement between plaintiff William Walker and defendant The Transportation Company for transportation services from New York to San Francisco. After completing his journey, Mr. Walker sued for breach of contract when he received less than what had been agreed upon by both parties prior to embarking on his trip. In its ruling, the court held that while there may have been some ambiguity as to certain terms within the contract itself, it did not render it invalid or unenforceable under state law; rather, any ambiguities should be interpreted according to their plain meaning at the time they were made by both parties involved in order for them to receive their due compensation as per their contractual obligations. Ultimately, this decision established that contracts are binding even if there is some uncertainty regarding specific language contained therein so long as all other requirements are met and understood by those entering into such agreements

In Walker v. The Transportation Company, the Supreme Court was asked to decide whether a state law that allowed for the recovery of damages in cases of wrongful death violated the Constitution's Contract Clause. Justice Field delivered a dissenting opinion, arguing that while he agreed with the majority opinion that states have broad authority to pass laws regarding matters within their jurisdiction, this particular law went too far and infringed on Congress' exclusive power over interstate commerce. He argued that since it applied not only to deaths occurring within one state but also those occurring across multiple states, it had an effect on interstate commerce and thus should be struck down as unconstitutional. Furthermore, he noted that if such laws were allowed to stand then they would effectively nullify any contracts between parties from different states which could lead to significant economic disruption throughout the nation.