<p>Democratic front-runner Hillary Clinton’s campaign barely outpaced Bernie Sanders’ in the third quarter of 2015, a surprising development that shows the insurgent candidate’s strength while the former secretary of state struggles.</p><p>Clinton’s operation raised more than $28 million in the third quarter after a grueling fundraising schedule, compared to just over $24 million for the Vermonter — who raised his money largely from online donations, and few in-person fundraising events.</p><p>The narrow gap illustrates Sanders’ momentum in the third quarter, as he overtook Clinton in polling in both New Hampshire and Iowa.