Why does partisanship typically become a major obstacle in the impeachment process?

The impeachment process is prescribed in the Constitution. However, history has shown that partisan opposition from Congress is key to trial an impeachable offense.

James Buchanan, Ulysses S Grant, Harry Truman, and Ronald Reagan had sufficient backing in Congress to suffocate any attempts towards impeachment hearings even when there was evidence that there might be a reason to do so.

the committees of correspondence were the american colonies’ means for maintaining communication lines in the years before the revolutionary war. in 1764, boston formed the earliest committee of correspondence to encourage opposition to britain’s stiffening of customs enforcement and prohibition of american paper money. the following year, new york formed a similar committee to keep the other colonies notified of its actions in resisting the stamp act. in 1773, the virginia house of burgesses proposed that each colonial legislature appoint a committee for intercolonial correspondence. the exchanges that followed built solidarity during the turbulent times and bring about the formation of the first continental congress in 1774.

they bring people together to achieve control of the government

basically choosinng what sets in   congress and presdicny this is to keepthe antion hole and so it can last because wiht out authority it wouldnt last a week