Marc Caputo for Politico:
Supreme Court nominee Neil Gorsuch seemed to be on track for a full Senate vote when a key Democrat helped throw it in doubt: Bill Nelson of Florida.
Nelson’s position had been closely watched. As a Senate indicator species — he’s an institutional centrist with a history of allowing Supreme Court picks to get a full vote — his stance on Gorsuch stood to provide insight into the political calculus of other Trump-state Senate Democrats who, like him, will be up for reelection in 2018.
By announcing on Monday his intention to filibuster Gorsuch, Nelson raised questions about the judge’s path to 60 votes and revealed a shift in political fault lines in the confirmation fight. Faced with the prospect of a primary challenge in the event he didn’t filibuster and the likelihood of a tough general election campaign against GOP Gov. Rick Scott either way, Nelson chose to lock down his left flank.