 Willis was an unsuccessful Republican candidate for election in 1892 to the 53rd Congress, but was elected to the 54th Congress, serving from March 4, 1895, to March 3, 1897.He was an unsuccessful candidate, however, for reelection in 1896 to the 55th Congress, and returned to the full effort of agricultural pursuits.He died in Milford and was buried in the Barratt's Chapel Cemetery near Frederica, Delaware.