Disgraced former Democratic state Sen. Malcolm Smith was so desperate to become New York’s next mayor that he spearheaded a $200,000 bribery scheme with equally crooked Republicans to buy his way onto the 2013 GOP line, a federal prosecutor said in closing statements Tuesday.

“Smith was the first person in this bribery scheme … This is about a man that wanted to be a mayor so bad that when things weren’t going his way he turned to bribery,” ­Assistant US Attorney Douglas Bloom told jurors in closing remarks in the White Plains federal court retrial of Smith (D-Queens) and former Queens GOP Vice Chairman Vincent Tabone.

Bloom also tried to shoot down Smith’s entrapment defense, saying the indicted pol was usually the first person to mention bribery in conversations with the undercover federal agent he knew as “Raj.”

“Smith was ready and willing with every crime,” he added.

Prosecutors say Smith turned to the agent posing as a businessman and Moses Stern — a crooked Rockland County developer turned federal witness — for money and help plotting the botched scheme to buy the GOP line for mayor. In return, Smith allegedly promised them $500,000 in transportation funds for a road project in suburban Spring Valley.

Smith’s lawyer Gerald Shargel, however, told jurors that his client was deceived into thinking he was being offered legitimate political support when it was actually “all a lie.”

“Stern was just telling lies. How would Malcolm Smith know it was a lie?” the lawyer said.

Smith faces up to 45 years in prison, and Tabone faces up to 30 years.

A retrial was necessary after Judge Kenneth Karas declared a June mistrial when the feds failed to release more than 92 hours of recordings as evidence in a timely manner.