Final answer:
Buckley v. Valeo established limitations on campaign contributions and expanded free speech rights for candidates by striking down limits on campaign expenditures, affirming that spending money is a form of constitutionally protected free speech.
Step-by-step explanation:
The case of Buckley v. Valeo had significant effects on campaign finance laws in the United States. It resulted in two major outcomes: firstly, it upheld the right of Congress to place limitations on campaign contributions, which was deemed as a way to prevent corruption and undue influence in political campaigns. Secondly, the decision expanded free speech rights for candidates by striking down limits on campaign expenditures by candidates and their families, as well as total expenditures by campaigns, affirming that spending money to influence elections is a form of constitutionally protected free speech under the First Amendment.