Suffolk University says Donald Trump has gained 6 percentage points in Florida during the last month, putting him one point ahead of Hillary Clinton.

In the new Sept. 19 to Sept. 21 poll, Trump scored 45 percent support in the critical swing-voting state, marking the six-point gain since Suffolk’s Aug. 1 to Aug. 3 Florida poll.

In the same two polls, Hillary Clinton’s support nudged up from 43 percent in early August to just 44 percent in late September. Support for the libertarian candidate, Gary Johnson, fell from 4 percent in August down to 3 percent in late September.

“Hillary Clinton’s support remains in the mid-forties, but she has lost her August lead because Donald Trump is aggregating previous undecided and Johnson supporters in his camp,” said the statement from David Paleologos, director of the Suffolk University Political Research Center in Boston, Mass.

According to the press release from Suffolk, “the Florida survey of 500 likely voters was conducted Sept. 19-21 using live telephone interviews of households where respondents indicated they were very or somewhat likely to vote in the 2016 general election. The margin of error is +/-4.4 percentage points at a 95 percent level of confidence.”