WASHINGTON (AP) — The political parties, their campaign committees and some of their super PACs faced a Saturday deadline to disclose how much donors gave and how much operatives spent in August. Hedge fund executive Tom Steyer continued to funnel cash from his personal fortune to his pro-environment super PAC, NextGen Climate Action. Steyer in August wrote his federal committee a $15 million check as it ramps up a political operation to help candidates who pledge to back legislation combating climate change. The group, which has deep ties to Senate Majority Leader Harry Reid, has raised $39 million so far and spent $36 million of it to try to keep Democrats in control of that chamber. The RNC raised $10.1 million in August and has $14.5 million in the bank to pay for polling, data and get-out-the-vote efforts for November's elections. Despite the aggressive spending, the group still has more than $25.3 million to unleash on ads against Republican candidates who are trying to pick up the six seats needed to tip the chamber into GOP control. The summary also indicates it spent $12 million in August alone, as officials began to empty bank accounts on ads to help Democratic candidates. [...] the party that holds the White House tends to lose seats at this point in a president's tenure and President Barack Obama remains deeply unpopular in many congressional districts.