WASHINGTON (AP) — A handful of presidential candidates will file key financial reports this weekend that will offer the first complete look into the Republican campaigns.The reports being filed Saturday are expected to show how flush GOP candidates are with cash — or how nearly broke they are — heading into the remaining weeks before contests in key primary states.Campaign filings on former Massachusetts Gov. Mitt Romney and President Barack Obama reveal millions in fundraising from party devotees and small-dollar donors.Texas Gov. Rick Perry, Minnesota Rep. Michele Bachmann and businessman Herman Cain have until a minute before midnight to file their first campaign reports.