“Republicans might be united on the public stage as they face off with Democrats ahead of a government shutdown. But a much more divisive internal fight waits in the wings,” Politico reports.“The year-end expiration of health insurance subsidies first created under the Affordable Care Act is already splitting the GOP, seeming to vindicate Democrats’ decision to predicate their shutdown messaging on extending the tax credits.”“Republican leaders have been trying to punt the issue as they work to force Democratic senators to swallow a seven-week stopgap measure ahead of the midnight deadline, insisting they will not broach the subject while agencies are closed.”“But top Democrats said they heard a different message Monday in their Oval Office meeting with President Donald Trump, leaving the sitdown convinced he’s willing to negotiate on the expiring tax credits in the weeks ahead.”