 voice on the issue of abortion rights. And that's why Democrats also feel like she'll be very effective on this issue, an issue they hope defines this election in November. ABC senior congressional correspondent Rachel Scott. The head of the Secret Service, Kim Cheadle, will appear before Congress today. House Oversight Committee Chair James Comer issued a subpoena to ensure that she will be there. A bipartisan independent review of the attempted assassination of Donald Trump will also take place.