Do I have any chance at Dartmouth?

Am I hopeless? My main concern is over whether or not to submit the subject tests, as they are optional.

GPA: 3.97 unweighted (ranked 2nd in class)
SAT: 1580, 800 math, 780 reading
Subject Tests: 710 US history, 690 Math
AP Tests: US History (5), Stats (4), Bio (4), currently taking English Language, French, Calc BC, Computer Science A, and Government

Noteworthy Extracurriculars
Speech and Debate 3 years - competed at many national circuit tournaments and at Nationals, started and currently running a middle school speech and debate program and co-coaching another one.
National Honor Society Seargent in Arms
Student Council class rep.

No, you are not hopeless, but remember that Dartmouth is very selective. For every student who gained admission last year, there were dozens more that were equally qualified. Yes, submit your subject tests and work hard on your essays. Good luck!

Should I retake the subject tests and shoot for a higher score? Or is what I have passable?