[8][9] The firm operates in bankruptcy, personal injury, social security disability, workers' compensation, and nursing home abuse.

[13] Castle was one of five original founders of the Constitution Party in 1992, which was created to support the candidacy of Howard Phillips.

[17] After losing the Constitution Party nomination to Virgil Goode four years later and receiving only 30% of the votes, Castle became the nominee the following cycle.

[23] The campaign had ballot access in Alaska, Arkansas, Colorado, Florida, Hawaii, Idaho, Iowa, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, Nevada (as the Independent American Party of Nevada), New Jersey, New Mexico, North Dakota, Pennsylvania, South Carolina, South Dakota, Utah, Washington, West Virginia, Wisconsin, Wyoming, with write-in status in Alabama, Delaware, Georgia, Indiana, Maine, New Hampshire, Ohio, Oregon, Rhode Island, Texas, and Vermont.

The campaign attempted and gained write-in status in Arizona, California, Connecticut, Illinois, Kansas, Kentucky, Maryland, Massachusetts, Nebraska, New York, North Carolina, Tennessee, and Virginia.

[24] The campaign's main objective was to adhere to the United States Constitution, citing it as a "charter of liberty for the American Republic".

[8] Castle believes in the United States withdrawing from the United Nations in order to regain sovereignty, freedom, and independence, citing the U.N. as a "church of unbelieving humanism" that is in "direct opposition to the ideas of America" and "an affront to liberty and human dignity".

He supports vetoing any attempt to spend money to fund Planned Parenthood and other abortion providers along with taking away the power of the Supreme Court to preside over the matter via recommendation and collaboration with Congress.

[31] Citing James Madison, the platform and campaign favor a moratorium on immigration to the United States until proper security procedures and the discontinuation of all federal subsidies and assistance, except under extreme circumstances.

They also reject giving citizenship to children of immigrants born in the country, extension of amnesty and bilingual ballots along with supporting English as the official language for all government business.