What factors make it more likely that a bill will become law? What factors make it less likely? Is it easy or difficult to pass a bill?

What factors make it more likely that a bill will become law? What factors make it less likely? Is it easy or difficult to pass a bill? What are some of the advantages of passing legislation quickly? What are some of the disadvantages?Does fundraising consume too much of the legislators' time and energy? Does it affect their behavior? Why or why not?