Members of Congress have long sought to combat assertions of presidential power and alleged executive misconduct through committee investigations. But are such investigations mere political theater, or do they have systematic effects on the course of politics? We argue that congressional investigations of the executive branch damage the president's support among the public, making investigations a useful tool in interbranch battles. Marshaling an original data set of more than 3,500 investigative hearings and over 50 years of public opinion data, we show that increased investigative activity in the hearing room significantly decreases the president's job approval rating. A survey experiment both confirms our assertion that investigations decrease public support for the White House and shows that committee-led charges of misconduct have a greater influence on public opinion than identical charges not attributed to a congressional actor. Copyright © Southern Political Science Association 2014.

While efficacious vaccines have been developed to inoculate against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; also known as COVID-19), public vaccine hesitancy could still undermine efforts to combat the pandemic. Employing a survey of 1096 adult Americans recruited via the Lucid platform, we examined the relationships between vaccine attributes, proposed policy interventions such as financial incentives, and misinformation on public vaccination preferences. Higher degrees of vaccine efficacy significantly increased individuals' willingness to receive a COVID-19 vaccine, while a high incidence of minor side effects, a co-pay, and Emergency Use Authorization to fast-track the vaccine decreased willingness. The vaccine manufacturer had no influence on public willingness to vaccinate. We also found no evidence that belief in misinformation about COVID-19 treatments was positively associated with vaccine hesitancy. The findings have implications for public health strategies intending to increase levels of community vaccination.