Biden said, "This is bullshit. This is malarkey. This is outrageous. Outrageous for the president of the United States to go to a foreign country, sit in the Knesset... and make this kind of ridiculous statement... Since when does this administration think that if you sit down, you have to eliminate the word 'no' from your vocabulary?" He later apologized for using the expletive. Biden was a familiar figure to his Delaware constituency, by virtue of his daily train commute from there, and generally sought to attend to state needs. He strongly supported increased Amtrak funding and rail security; he hosted barbecues and an annual Christmas dinner for the Amtrak crews, who sometimes held the last train of the night a few minutes so he could catch it. He earned the nickname "Amtrak Joe" as a result (and in 2011, Amtrak's Wilmington Station was named the Joseph R. Biden Jr. Railroad Station, in honor of the 7,000-plus trips he made from there). He was an advocate for Delaware military installations, including Dover Air Force Base and New Castle Air National Guard Base. In 1978, when Biden was seeking reelection to the Senate, Wilmington's federally mandated cross-district busing plan generated much turmoil. Biden's compromise solution between his white constituents and African-American leaders was to introduce legislation to outlaw the court's power to enforce certain types of busing, while allowing it to end segregation school districts had deliberately imposed. White anti-integrationists seized on a comment Biden made that he would support the use of federal helicopters if Wilmington's schools could not be voluntarily integrated, and Delaware NAACP head Littleton P. Mitchell later said Biden "adequately represented our community for many years, but he quivered that one time on busing." The compromise nearly alienated him from both working-class whites and African-Americans, but tensions ended after the end of a teachers' strike that began over pay issues raised by the busing plan. Beginning in 1991, Biden served as an adjunct professor at the Widener University School of Law, Delaware's only law school, teaching a seminar on constitutional law. The seminar was one of Widener's most popular, often with a waiting list for enrollment. Biden typically co-taught the course with another professor, taking on at least half the course minutes and sometimes flying back from overseas to make one of the classes. During the 2000s, Biden sponsored bankruptcy legislation that was sought by MBNA, one of Delaware's largest companies, and other credit card issuers.