Sen. Benjamin L. Cardin (D-Md.) is well-positioned to win re-election in November, but second place appears up for grabs, according to a new poll.

Republican Dan Bongino and independent Rob Sobhani are in a dead heat for second, the poll by Gonzales Research & Marketing Strategies found. Cardin was the choice of 50 percent of voters, followed by Bongino with 22 percent and Sobhani with 21 percent. Seven percent are undecided.

Sobhani has invested a sizable amount into TV ads promoting his candidacy.

The Gonzales poll also shows President Obama in a strong position to carry one of the bluest states in the nation.

In Maryland, Obama is leading GOP nominee Mitt Romney, 55 percent to 36 percent. Nine percent are either undecided or say they’ll vote for someone else.

The poll included 813 registered voters who say they are going to vote in the November election. It was conducted between Sept. 17 and Sept. 23. The margin of error is plus or minus 3.5 percentage points, according to Gonzales.