NEW YORK — After two and half months in the city’s top job, Mayor Eric Adams has the approval of 61% of city residents, according to a new poll released Monday by Marist College. The poll, which was taken during the first eight days of March, also shows that 40% of registered voters surveyed believe Adams is doing an excellent or good job. That’s about the same as the 39% his predecessor former Mayor Bill de Blasio got after taking office in 2014, but lower than the 50% rating that former Mayor Michael Bloomberg got after stepping into City Hall. “This poll clearly demonstrates that Mayor Adam…