Unverified50% confidenceFactExact time
乔治·察贝利斯的否决者理论指出否决点越多，政策变革越困难
1
Sources
50%
Confidence
Long-term
Relevance
7/8/2026
First Seen
Sources
美国建国250周年：烟花背后，立国理想仍面临严峻挑战
rss7/6/2026
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