Commencement of the 441st legislative session of the Maryland General Assembly on Wednesday marked the first time in more than three decades since the Senate has had a new president. Sen. Mike Miller, who has led the upper chamber since 1987, is considered an institution in Maryland politics and is well-known on the national stage. Miller, who is 77, is battling prostate cancer and handed over his office to 36-year-old Sen. William Ferguson, D-Baltimore City. Ferguson, a teacher and an attorney, has served in the Senate since 2011. His rise to the upper echelon of Maryland politics comes less than a year after the death of four-term House Speaker Michael Busch culminated in the election of Del.