Good luck, Mr. Ryan

House Republicans nominated Rep. Paul Ryan to serve as the next speaker this week. We wish him luck. Ryan promised that his speakership would bring “real reform.” Every American should hope he succeeds in establishing a governing majority that acts on issues Congress has let fester for years—and that the rules changes he demands will enable him to act with less fear of Freedom Caucus conservatives than outgoing Speaker John Boehner, R-Ohio.

Yet he faces several grave challenges, some self-imposed. Top among them is that Ryan promised hard-right members of Congress that he would respect the informal “Hastert Rule,” which requires that a majority of the majority party in the House favor a bill for it to get a floor vote. Adherence to the rule unwisely blocks important policies that would win a majority of House members if they came to an up-or-down vote, restricting the House’s ability to work on behalf of a majority of Americans.

Ryan, meanwhile, can’t assume that a Republican will be in the White House in 2017 to make it easier for him to tackle immigration and the budget. Even if there is a GOP president, measures such as raising the debt limit will remain unpopular necessities—and very difficult to pull off without Democratic votes.

Ryan attempted to seek the speaker’s gavel on his own terms, informing the GOP caucus that he would not take the job unless the right wing put down one of its weapons, a procedure to remove the speaker by majority vote. Yet that alone will not solve the House’s dysfunction. At some point during his speakership, it is likely that Ryan will have to choose between failing the country or violating one of the pledges he made to conservatives. When that happens, we hope and trust that he will make the right choice.