Stefani Reynolds/Getty Images U.S. Sens. Marco Rubio (R-FL) and Kirsten Gillibrand (D-NY) have introduced bipartisan legislation aimed at providing “presumptive U.S. Department of Veterans Affairs benefits to service members who have deployed and have illnesses due to exposure to burn pits and other toxins.” Reps. Raul Ruiz (D-CA) and Brian Fitzpatrick (R-PA) will introduce the…