[...] the National Rifle Association's political committee is pooling together small contributions to run attack ads against Democratic presidential nominee Hillary Clinton. The presidential candidates and many outside groups must report their July fundraising and spending details to federal regulators by midnight Saturday. Outside groups facing no contribution limits are piling up money ahead of what could by a brutal fight for control of the Senate, with Indiana, Florida, North Carolina and Ohio among the key races. The National Rifle Association, which endorsed Republican presidential nominee Donald Trump over the summer, through its political committee has aired about $5 million in TV ads knocking Clinton. The NRA Political Victory Fund's July fundraising shows that money came from donors giving $5,000 or less, because it is not a super PAC and therefore faces campaign finance limitations.