No challenger to eight-term Republican Rep. Darrell Issa has come any closer than 16 points in California’s 49th District.

But Issa trails Democrat Doug Applegate by 4 points in a Democratic poll obtained first by Roll Call.

The poll, conducted Sept. 28-30 for the Democratic Congressional Campaign Committee by Tulchin Research, put Applegate at 46 percent and Issa at 42 percent.

Twelve percent of the 400 likely voters surveyed were undecided. The survey was conducted on landlines and cell phones and had a margin of error of 4.9 percentage points.

In the presidential race, Democrat Hillary Clinton held a 14-point edge in this district, which Mitt Romney carried by 6 points in 2012. Clinton led her GOP rival Donald Trump 49 to 35 percent. The polling memo pointed out that this survey was conducted after the first presidential debate last week.