Sorafenib and Fulvestrant in Treating Patients With Locally Advanced or Metastatic Breast Cancer That Did Not Respond to Aromatase Inhibitor Therapy

RATIONALE: Sorafenib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth and by blocking blood flow to the tumor. Estrogen can cause the growth of breast cancer cells. Hormone therapy using fulvestrant may fight breast cancer by blocking the use of estrogen by the tumor cells. Giving sorafenib together with fulvestrant may kill more tumor cells. PURPOSE: This phase II trial is studying how well giving sorafenib together with fulvestrant works in treating patients with locally advanced or metastatic breast cancer that did not respond to aromatase inhibitor therapy.