Interactive Graphics

Kara Eastman, an ardent gun-control advocate and one of two Democrats vying to challenge Republican incumbent Don Bacon in a district centered in Omaha, Neb., poses before a event in Omaha on April 5, 2018, the same day that the number of women running for the U.S. House seats set a record nationwide. The vast majority of the women are Democrats motivated against President Donald Trump and policies of the Republican-controlled Congress. (AP Photo / Nati Harnik)

In this March 2, 2018 photo, a group of JROTC shooters compete in the prone position during the 2018 New Mexico Junior Olympic Qualifier for sport and precision air rifles at Cibola High School in Albuquerque, N.M., for the chance to compete at the National Junior Olympic Championships in Ohio in June. The National Rifle Association has given more than $7 million in grants to hundreds of U.S. schools in recent years, typically used for JROTC programs, including $126,000 given to Albuquerque schools. (Marla Brose/Albuquerque Journal via AP)

In this Jan. 1, 2018 photo, A customer purchases marijuana at Harborside marijuana dispensary in Oakland, Calif., Jan. 1, 2018. Just days after recreational marijuana sales became legal in California, Attorney General Jeff Sessions announced he was rescinding a policy that had let legalized marijuana flourish without federal intervention in states across the country. (AP Photo/Mathew Sumner)