Answer:
To reduce soft money contributions to political parties.
it has caused spending by interest groups to increase
Explanation:
giving money to political campaigns is considered free speech:
in "citizen united v fec" the supreme court said because corporations giving money to political campaigns is considered free speech and the government cant restrict it. giving money is protected under the first amendment
Soft money is unregulated donations to political parties for general "party-building" purposes, not the support of a particular candidate so it avoid various legal limitations
Bipartisan Campaign Reform Act aka McCain-Feingold Act is a major amendment of the Federal Election Campaign Act 1971 passed by the US congress in 2002. Its goal was to reduce the increased use of soft money to fund advertising by political parties.
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