Read Team of Rivals by Doris Kearns Goodwin, and get back to us.
There are countless other examples, but I'll let Lincoln's remarkable appointments of William Seward (Secretary of State), Salmon Chase (Secretary of the Treasury) and Edward Bates (Attorney General) serve to rebut your ridiculous assertion above.
Not only were they competent, they all disliked Lincoln immensely.
Here's a list of "across party line" appointments by both Republican and Democratic Presidents in case you need more data. Click.....
Fair enough PH. Should have been more clear. Any modern politician.
Holding any of the clowns that hold public office right now up to Lincoln’s standard is going to leave the modern guys being weighed, measured and found wanting.