16. Is there a limit on the amount a donor can contribute to a political party during an election?

https://www.fec.gov/resources/cms-content/documents/contribution_limits_chart_2019-2020.pdf

Spending limits for individual donors are: 

U.S. Presidential Candidates- $2,800 per election to each candidate. 

U.S. House and Senate candidates- $2,800 per election to each candidate. 

Federal PACs- $5,000 per year to each PAC. 

National Party Committees- $35,500 per year to each national party committee. 

State and Local Party Committees- Combined $10,000 limit for party committees in each state. 

See the FEC’s full breakdown on contribution limits:  https://www.fec.gov/resources/cms-content/documents/contribution_limits_chart_2019-2020.pdf