Democratic and Republican sources say that internal polling from both sides show the race for Congress in New Jersey’s seventh congressional district to be tightening. That confirms a Majority Watch independent poll that has GOP Congressman Michael Ferguson leading Democratic Assemblywoman Linda Stender by a 46%-43% margin — a statistical dead heat. Stender, who has raised $1.8 million and has won endorsements from the Star-Ledger, the New York Times, the Courier-News and the Hunterdon County Democrat, is also touting a new endorsement from actor Michael J. Fox. According, PoliticsNJ.com has moved this race — for at least the next 48 hours — into the Toss Up column, although the presence of Thomas H. Kean, Jr., who represents part of the district in the State Senate, could (ironically) be to Ferguson’s benefit.