Mike has led a number of ground-breaking cases, locally and nationally. He was recognized by the National Law Journal in its triennial selection of the “100 Most Influential Lawyers in America.”


For over 25 years, Mike has been considered one of our country’s leading lawyers. In the mid-1980’s, the FDIC selected him to head its litigation against New York, mob-related money broker, Mario Renda. In 1989, he was lead counsel in MDL-834 – the Lincoln Savings/Charles Keating case. At the time, MDL-834 was the largest commercial litigation in U.S. history. In 2000, Mike obtained an $8.25 million settlement against Joe Arpaio and the Maricopa County Sheriff’s Office, one of the largest wrongful death and civil rights settlements in Arizona history. In early 2006, he obtained a $9 million verdict against the MCSO and Maricopa County in another historic wrongful death case. In 2015, Mike had another "Top 10 Verdict." He was lead counsel for the 10K Partnership and obtained $288 million in compensatory damages. That verdict was the largest in Arizona in 2015 according to Arizona Attorney magazine. In 2017 Super Lawyers and SuperLawyers.com named Mike as one of the Top 50 lawyers in Arizona.

In addition to his regional and national litigation successes, Mike has significant international experience in connection with construction contracts, technology exchange contracts, royalty agreements, distributor agreements and sales agreements in Norway, Great Britain, France, the Philippines, Taiwan, South Korea, Hong Kong, Malaysia, Indonesia and Singapore.


In 1995, Mike was retained to pursue Arizona’s then current Governor, J. Fife Symington, III, for fraud in connection with a real estate loan. A few months after his fraud complaint was filed, the governor was indicted on 23 counts of fraud which paralleled Mike’s allegations. He successfully tried that fraud/bankruptcy case.

In 2001, Mike achieved the second largest commercial case punitive damages verdicts in Arizona history. The jury awarded his client a defense verdict on claims made against his clients and then awarded over $26 million in punitive damages.

In the summer of 2004, Mike tried back-to-back three-week jury trials. He won both trials with unanimous jury verdicts. His clients in these commercial fraud and breach of contract trials were awarded more than $20 million in damages.

In 2009, Mike successfully concluded a large case against an international union that had threatened to destroy one of Arizona’s legacy businesses if that business did not allow unionization of its employees.

News & Insights



Recognized as one of the "Top 100 Lawyers in Arizona" by AZ Business magazine

Ranked as one of the Top 100 lawyers in Arizona for 2018 by AZ Business in the following Practice Areas: business litigation, antitrust, governance, risk and compliance, and real estate litigation

Ranked as one of the Top 50 lawyers in Arizona for 2017 by Super Lawyers

Ranked as one of America's Leading Business Lawyers for Litigation: General Commercial, by Chambers USA: America's Leading Lawyers for Business

The May 2007 edition of Arizona Attorney magazine listed one of Mike’s jury verdicts as the third largest jury award in Arizona for 2006. Previously, the May 2005 edition featured the Top 10 Verdicts of 2004, Manning was lead trial counsel in two of those 10 cases, most notably the largest and the sixth largest jury awards in Arizona that year.

The Arizona Republic’s Arizona statehood centennial edition identified the top 10 scandals of Arizona’s first 100 years. Mike was intricately involved in discovering and resolving three of those 10, including the #1 scandal.

In 2005, he was recognized for his outstanding contributions to the Valley’s legal community by the Business Journal’s editorial board in its “Best of the Bar” edition – one of only four Arizona attorneys to receive that honor.

The Best Lawyers in America®, Commercial Litigation

Southwest Super Lawyers, Business Litigation, 2007-2020

Southwest Super Lawyers' Top 50 Attorneys in Arizona, 2020

Benchmark Litigation “Local Litigation Star,” 2011

Arizona Business Magazine’s Top Lawyers, 2012

AZ Magazine, "Top 50 Attorneys of Arizona," May 2012

Professional & Civic Activities

Professional & Civic Activities

State Bar of Arizona

Kansas Bar Association

The Missouri Bar

Bar Association of DC

FBI Citizens Academy, Board Member and Past President

Make-A-Wish Foundation of Central and Southern Arizona, active participant and significant fund-raiser

ASU Gammage Theatre, Board Member

In 1972, Mike ran in the general election for secretary of state for the state of Kansas. He was only 21 years old. After losing to the incumbent in a tight race, Mike worked for the governor for two years before enrolling in law school.

Practices & Industries


  • Arizona
  • Kansas
  • Missouri
  • U.S. District Court for the District of Columbia


Washburn University, J.D., cum laude, 1977

  • Washburn Law Journal, Editor-in-Chief, 1976-1977

Emporia State University, B.A., Political Science and Psychology, 1971

Jump to Page

We use cookies on our website to improve functionality and performance, analyze website traffic and enable social media features. For more information, please see our Cookie Policy.