Paul's campaign asked supporters to celebrate the Texas congressman's Aug. 20 birthday with a donation — and they gave him $1.6 million on that day alone. It's a pattern for Paul, who can seemingly turn on the money spigot when he needs to; his loyal libertarian backers have delivered like that on five occasions, to the tune of a million or more at a time.
The rest of the field lags far, far behind.
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All of these second- and third-tier candidates are trying to prove that they are still viable while trying to gather enough cash to pay for polling and advertising to push them through the pack. That's only going to get harder. Campaign fundraising is time-intensive and expensive. It limits time candidates can spend with voters. The meetings are private, limiting a candidate's ability to earn "free media" from news coverage.