Senator Jon Ossoff, a Georgia Democrat, one of this Senate cycle's strongest fundraisers, reported about $42 million cash on hand, nearly 20 times the amount reported by his opponent, Republican Mike Collins, according to recent Federal Election Commission (FEC) filings.Despite the sizable war chest, Ossoff's campaign has continued to press supporters for donations. In a July fundraising email, the campaign urged backers to contribute "just $5 to keep us on the air," adding that his ads are in “one of the most expensive media markets in the country.”Fundraising appeals warning of missed goals or urging small-dollar donations are common across...