The 26th Amendment to the United States Constitution, ratified in 1971, lowered the voting age from 21 to 18.

The primary role of the courts in election campaigns is to ensure that elections are conducted fairly and democratically, in accordance with the law.

The Equal Protection Clause of the Fourteenth Amendment to the United States Constitution provides the legal basis for judicial review of election laws and procedures, as it prohibits states from denying any person within their jurisdiction the equal protection of the laws.

The landmark Supreme Court case Reynolds v. Sims (1964) established the principle of "one person, one vote" by requiring that legislative districts be drawn with substantially equal populations.

Campaign finance laws aim to limit the influence of money in politics by regulating the sources and amounts of campaign contributions and expenditures.

The Federal Election Commission (FEC) is the independent regulatory agency responsible for enforcing campaign finance laws in the United States.

The Citizens United v. FEC (2010) Supreme Court decision struck down limits on independent expenditures by corporations and unions, allowing them to spend unlimited amounts of money on political campaigns.

Judicial review of campaign finance laws aims to ensure that such laws comply with constitutional principles, including the First Amendment rights of free speech and association.

Injunction is a legal doctrine that allows courts to order changes to election procedures or outcomes based on violations of constitutional or statutory rights.

The Supreme Court's decision in Bush v. Gore (2000) set a precedent for resolving disputed presidential elections by halting the recount in Florida, effectively deciding the outcome of the election.

In Brnovich v. Democratic National Committee (2021), the Supreme Court upheld the constitutionality of Arizona's voter ID law, rejecting claims that it discriminated against minority voters.

The Voting Rights Act of 1965 was enacted to prohibit discrimination in voting based on race or color, particularly in areas with a history of racial discrimination.

In Shelby County v. Holder (2013), the Supreme Court struck down Section 4(b) of the Voting Rights Act, which required certain states with a history of racial discrimination to obtain federal approval for changes to their voting laws.

The National Voter Registration Act of 1993 (NVRA) aims to simplify and standardize voter registration procedures, making it easier for citizens to register to vote.

In Rucho v. Common Cause (2019), the Supreme Court upheld the constitutionality of partisan gerrymandering, ruling that federal courts lack the authority to intervene in such cases.