Johnson is a moderate Republican. She called herself "an independent voice in Washington", although she frequently supported the mainstream Republican agenda. Some nonpartisan observers such as National Journal rated her near the ideological midpoint in the House, although others, like the American Conservative Union (ACU) rated her as a moderate conservative. The ACU gave Johnson's 2005 voting record 40 points out of 100; the liberal Americans for Democratic Action gave her 35 points. In general, she was moderate-to-liberal on social issues and conservative on economic ones.