When he takes office on Jan. 20, 2017, Donald Trump will have something in common with Dwight Eisenhower—beyond the fact that neither was a politician before stepping into the presidency. That is, he’ll have both chambers of Congress in his own party. Not a bad place for a president to start, but one of Ike’s first lessons when he took office in 1953 was that members of his own party could sometimes be his harshest critics. In any case, Ike’s Republican Congress didn’t last. In a blink of an eye, the 1954 elections came and restored Democratic control. Ike was left to grapple with a Democratic Congress for the next six years. Top Republicans are well aware of this lesson today—“Nothing is forever in this country,” Senate Majority Leader Mitch McConnell warned his giddy GOP colleagues on Nov. 9. The next election is less than two years away. As Ike might have advised, best to make friends where you can.