After winning New Hampshire’s Democratic primary this week, presidential candidate Bernie Sanders is on track to keep giving Hillary Clinton a run for her money, including in states like Illinois — once thought to be in her corner.

Clinton leads Sanders by just 11 points in Illinois, according to a new poll of primary voters shared with The Daily Caller by the firm McKeon & Associates.

The former secretary of state gets 36.4 percent to Sanders’ 25.5 percent in the poll. Another 38.1 percent said they didn’t know who they would support.

The poll of 846 people who plan to vote in the state’s Democratic primary on March 15 was conducted Feb. 3 and 4 and has a margin of error of 3.9 percent.

Mike McKeon, whose firm conducted the poll, told TheDC he thinks Clinton’s weak poll numbers reveal potential trouble ahead, because these voters are her “base.”

[dcquiz] “If she doesn’t do well with the base, it ain’t looking good,” McKeon said.

Clinton’s supporters have dismissed Sanders’ victory in New Hampshire’s primary by pointing out the “firewall” she will have in upcoming states, especially in South Carolina with the support of minority voters.

But McKeon said Clinton shouldn’t be so sure about Illinois.

“She thinks she’s going to count on that as a firewall,” he said, “now it might be a firestorm.”

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