After months of waiting for the inevitable, Hillary Clinton finally got what she wanted on Tuesday as Bernie Sanders endorsed her for president. But it was an awkward embrace that did little to convince anyone that the two wings of the Democratic Party are truly at peace with each other.

Sanders endorsed Hillary knowing that he had pushed her farther to the left than she probably had ever dreamed of going before the campaign began. He could take some grim satisfaction in the fact that he got much, though not all, of what he had wanted to be included in the Democratic platform. Clinton refused to give in to Sanders’ push to brand Israel with the term “occupation,” and did not include opposition to the TPP trade bill, but the rest pretty much went his way. Clinton’s acquiescence to allowing her party to promise an even more vast increase in federal spending and new entitlements in the platform is a genuine victory for Sanders.

But now Clinton has to ponder whether the price she paid for him bending the knee was too high. Her efforts may still fail to secure the enthusiasm of his followers while at the same time preventing her from pivoting back to the center to compete with Trump for swing state voters.

Clinton’s dilemma is that the two things she needs to guarantee victory against Trump may be mutually exclusive.

On the one hand, Clinton needs to do what she can to ensure that Trump doesn’t steal more white working class voters from the Democrats. Tilting left to adopt an anti-free trade stance may be one way to do that even if such a stance isn’t particularly credible on her part.

Competing against Trump for voters who don’t identify as hardcore liberals also means signaling to the center of the political spectrum that she is not in complete thrall to the left. In the past, a Democrat that wanted to demonstrate such independence would do as her husband did in 1992 by orchestrating a “Sister Souljah moment” where she could play to independents. But the other requirement for Democratic victory prevents that.

More than winning the affection of Sanders, the key for a Clinton victory is the scale of turnout among black and Hispanic voters. It was that massive outpouring for Obama that ensured the president’s two election victories. That is why Clinton cannot go as far as President Obama did in his memorial speech in Dallas when he condemned those who call for violence against the police. Even though she needs to be mindful that it is those working-class whites who may be tempted to fall for Trump’s Nixonesque law-and-order appeal, she dares not say anything that could be interpreted as standing up to racial hucksters.

Trump’s unpopularity and the hostility he generates among minority voters may make up for all those problems, no matter how hard Clinton may struggle to reconcile these competing interests. But moving to the center is what is supposed to happen in a general election, and Hillary’s vital need to keep the left and minority voters happy is turning that conventional tactic into a risky move.