Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Who is Francis Preston Blair ? Title: Lincoln Movie plot: In January 1865, President Abraham Lincoln expects the Civil War to end within a month. However, he is concerned that his 1863 Emancipation Proclamation may be discarded by the courts once the war has concluded and that the proposed Thirteenth Amendment will be defeated by the returning slave states. Lincoln feels it is imperative to pass the amendment by the end of the month, thus removing any possibility that slaves who have already been freed may be re-enslaved. The Radical Republicans fear the amendment will be defeated by some who merely wish to delay its passage; the support of the amendment by Republicans in the border states is not yet assured either, since they prioritize the issue of ending the war. Even if all of them are ultimately brought on board, the amendment will still require the support of several Democratic congressmen if it is to pass. With dozens of Democrats having just become lame ducks after losing their re-election campaigns in the fall of 1864, some of Lincoln's advisors believe that he should wait until the new Republican-heavy Congress is seated, presumably giving the amendment an easier road to passage. Lincoln, however, remains adamant about having the amendment in place and the issue of slavery settled before the war is concluded and the southern states readmitted into the Union. Lincoln's hopes for passage of the amendment rely upon the support of Francis Preston Blair, a founder of the Republican Party whose influence can ensure that all members of the western and border state conservative Republican faction will back the amendment. With Union victory in the Civil War seeming highly likely and greatly anticipated, but not yet a fully accomplished fact, and with two sons serving in the Union Army, Blair is keen to end the hostilities as soon as possible. Therefore, in return for his support, Blair insists that Lincoln allow him to immediately engage the Confederate government in peace negotiations. This is a complication to Lincoln's amendment efforts since he knows that a...
Francis Preston Blair is a founder of the Republican Party.