Insider wrote, "PBS is and always has been a bright light." On-air fundraising Since 53% to 60% of public television's revenues come from private membership donations and grants, most stations solicit individual donations by methods including fundraising, pledge drives or telethons, which disrupt regularly scheduled programming. This has been perceived as potentially annoying since regularly scheduled programming is often replaced with specials aimed at a wider audience (such as music specials aimed at the Baby Boomer generation and financial, health and motivational programs) to solicit new members and donations; during fundraising events, these programs are often interrupted within the broadcast by long-form segments (of six to eight minutes in length) encouraging viewers to donate to their PBS member. Underwriting spots are aired at the end of each program, which differ from traditional commercials in several ways. Each spot must be approved to meet several guidelines. The main guidelines state that underwriting spots cannot be qualitative in any way, nor can they have any call to action. Controversies Accusations of political/ideological bias A 1982 broadcast of the United States Information Agency program Let Poland be Poland about the martial law declared in Poland in 1981 was widely viewed in the U.S., but met with skepticism on the part of eastern European broadcasters (communist countries at the time) due to concerns that the program's "provocative and anticommunist" tone was intended as propaganda. In 1999, at least three public television stations were caught selling or trading their mailing lists with the Democratic National Committee. Under IRS regulations, nonprofit organizations are prohibited from participating in political actions. Officials from the Corporation for Public Broadcasting condemned the practice and conducted an investigation into the matter. The stations involved were in New York, Boston, and Washington. Individual programs aired by PBS have been the targets of organized campaigns by individuals and groups with opposing views, including by former United States Secretary of Education Margaret Spellings in 2005. Nonetheless, in every year since 2004, surveys of Americans have shown PBS to have been consistently ranked as the most trusted institution in comparison to commercial broadcast and cable television, newspapers, and streaming services, and in January 2021, Americans valued tax dollars spent on PBS behind only military defense and oversight of food and drug safety. Accusations during Tomlinson tenure In September 2003, Kenneth Tomlinson was chosen as chairman of the CPB board. He criticized PBS and NPR for