Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

When was the last time a member of the House was expelled?

 The last time a member of the United States House of Representatives was expelled was in 2002. On July 26, 2002, Representative James Traficant of Ohio was expelled from the House by a vote of 420-1. Traficant had been convicted on ten counts of corruption and bribery in April of that year, and the House voted to expel him based on the recommendation of the House Ethics Committee. Prior to Traficant, the last time a member of the House was expelled was in 1980, when Representative Michael Myers of Pennsylvania was expelled for his involvement in the Abscam scandal.

Expelling a member of Congress is a rare and serious action that is only taken in the most extreme cases. According to the rules of the House, a member may be expelled by a two-thirds vote of the body. This has happened only five times in the history of the House: in 1797, 1856, 1862, 1980, and 2002.