@PatriciaMazzei

A new poll by an anti-Donald Trump group has found a narrowing Republican presidential race in Florida, suggesting the barrage of TV ads by the group and its allies might be taking effect.

Trump leads Marco Rubio 35-30 percent ahead of the March 15 primary, according to the poll conducted for Our Principles PAC by The Tarrance Group, a Republican firm, and obtained by the Miami Herald. Ted Cruz drew 16 percent support, John Kasich 9 percent and Ben Carson 5 percent. (Carson formally dropped out Friday.) Six percent of respondents were undecided.

Earlier polls by other firms have suggested a wider -- in some cases, much wider -- margin between Trump and Rubio. The Democratic-leaning Public Policy Polling found Trump ahead by 20 percentage points, Quinnipiac University by 16 points and Associated Industries of Florida by 7 points. All those polls were conducted last week, before Our Priorities and two other groups -- American Future Fund and Club for Growth -- unleashed their anti-Trump advertising.

The New York Times reported Friday that Trump himself plans to advertise in Florida. Both Trump and Rubio are rallying in the state Saturday.