Historical backfill in progress — 136 corporate & association committees ingested so far of a ~1,500-committee sweep, expected complete July 11. Rankings shift as data lands; everything refreshes nightly.
Top offenders
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Data
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2024
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2026
MCCASKILL, CLAIRE
FEC ID
S6MO00305
Office
—
State
—
Party
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IE support
$62,642
IE oppose
$535,343
MCCASKILL, CLAIRE
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Independent expenditure activity (7 PACs)
Committee
Cycle
IE support
IE oppose
Filings
Violations
WOMEN SPEAK OUT PAC
2026
$0
$315,325
25
22
AMERICAN CROSSROADS
2026
$0
$128,195
2
11
ASSOCIATED BUILDERS AND CONTRACTORS, INC. POLITICAL ACTION COMMITTEE (ABC PAC)
2026
$0
$70,000
2
129
COMMUNICATIONS WORKERS OF AMERICA - WORKING VOICES
2026
$56,540
$0
14
25
OUR AMERICAN CENTURY
2026
$0
$21,823
6
3
WORKING FOR WORKING AMERICANS ? FEDERAL
2026
$6,035
$0
2
0
NEA ADVOCACY FUND
2026
$68
$0
1
6