Political campaign activity is directly or indirectly participating or intervening in any political campaign on behalf of or in opposition to any candidate for elective public office. This includes making contributions to political campaign funds or making public statements in favor of or in opposition to any candidate for public office.
For a 501(c)(3), violating the political campaign prohibition may result in revocation of tax-exempt status, and imposition of certain excise taxes.
Lobbying is activity in support of or in opposition to legislation. (Think “L & L”—Lobbying & Legislation.) Political activity is about supporting or opposing a candidate for elective office.