Answer:
B) Confederate soldiers almost invaded the White House.
Explanation:
This is because, when General McClellan fell out with Lincoln, he contested for the 1864 presidential election against the Republican Lincoln's reelection.
His popularity declined when he repudiated his party's platform (Democratic Party), which promised an end to the war and negotiations with the southern Confederacy. His negotiations with the southern confederacy was seen as a betrayal of trust.
