{"id":"SD-SEN","state":"SD","label":"South Dakota U.S. Senate","election_id":"87446","status":"called","winner_id":"civic-87446-f7f8c06a901b1f62","reporting":80,"previous_party":"R","afi_rating":{"rating":"Safe Republican","rating_tier":"safe_r","gop_win_chance":99,"updated":"2026-09-17T14:34:40+00:00","incumbent_party":"R","incumbent_name":"Rounds, Mike","open_seat":false,"trump_margin_2024":29.2,"gop_margin_2024":31.5,"source":"AFI Statewide Ratings","source_updated":"2026-09-21T19:53:41+00:00"},"updated":"2026-10-12T17:42:29.521Z","candidates":[{"id":"civic-87446-f7f8c06a901b1f62","name":"Brian Bengs","party":"I","votes":97159,"color":"#8a6d31","photo_url":"https://americafirstinsight.com/wp-content/uploads/2026/09/BengsIcon2.webp","source_name":"Brian Bengs","identity_aliases":[],"incumbent":false,"endorsed":false,"match_method":"exact","display_priority":1,"pct":56.25557292571362},{"id":"civic-87446-d1da1afa100264c4","name":"Mike Rounds","party":"R","votes":75551,"color":"#a21a15","photo_url":"https://americafirstinsight.com/wp-content/uploads/2026/09/RoundsIcon2-1.webp","source_name":"Mike Rounds","identity_aliases":[],"incumbent":true,"endorsed":false,"match_method":"exact","display_priority":0,"pct":43.74442707428638}],"featured_candidates":[{"id":"civic-87446-d1da1afa100264c4","name":"Mike Rounds","party":"R","votes":75551,"color":"#a21a15","photo_url":"https://americafirstinsight.com/wp-content/uploads/2026/09/RoundsIcon2-1.webp","source_name":"Mike Rounds","identity_aliases":[],"incumbent":true,"endorsed":false,"match_method":"exact","display_priority":0,"pct":43.74442707428638},{"id":"civic-87446-f7f8c06a901b1f62","name":"Brian Bengs","party":"I","votes":97159,"color":"#8a6d31","photo_url":"https://americafirstinsight.com/wp-content/uploads/2026/09/BengsIcon2.webp","source_name":"Brian Bengs","identity_aliases":[],"incumbent":false,"endorsed":false,"match_method":"exact","display_priority":1,"pct":56.25557292571362}],"matching_review":[],"office":"senate","election_type":"US Senate","county_data_status":"pending","county_data_note":"","total_votes":172710,"winner_party":"I","leader_party":"I","leader_name":"Brian Bengs","leader_color":"#8a6d31","vote_margin":21608,"margin":12.511145851427244}