With the general election in his sights, Republican Donald Trump delivered a sober foreign policy address Wednesday aimed at easing fears about his temperament and readiness to be commander in chief. Rival Ted Cruz made a desperate attempt to jolt the GOP race by tapping Carly Fiorina as his running mate.

Both moves underscored Trump’s commanding position in the GOP race. Though the businessman needs to keep winning primaries in order to clinch the nomination before this summer’s national convention, he has breathing room to start making overtures to general election voters. All Cruz can do is throw obstacles in his path.

Cruz planned to announce Fiorina as his vice presidential pick in Indiana, a state he must win next week in order to keep his White House hopes alive. A Republican with direct knowledge of Fiorina’s selection confirmed the pick on the condition of anonymity because the person was not authorized speak before the official announcement.

Texas’ Cruz and Ohio Gov. John Kasich are trying to keep Trump from securing the 1,237 delegates he needs to clinch, thereby pushing the Republican race toward a contested convention. But Trump strengthened his standing this week with a sweep of five Northeast primaries, giving him 77 percent of the delegates he needs.

Trump headed to Indiana Wednesday as well, following his address in Washington.

Before an audience of foreign policy experts in Washington, Trump outlined a doctrine that he said would put American interests first, leaving allies to fend for themselves if they don’t contribute financially to back up security agreements. He also vowed to send U.S. troops into combat only as a last resort, a break from years of hawkish Republican foreign policy.

“Our goal is peace and prosperity, not war and destruction,” he declared in the 38-minute address that was heavy on broad statements about U.S. strength and light on specific policy details. Unlike his rambunctious, free-wheeling rallies, Trump read prepared remarks in a measured tone off a teleprompter.

Trump also used the address to target Democratic front-runner Hillary Clinton, his expected opponent in a general election. He assailed her for her handling of the deadly 2012 attack on Americans in Benghazi, Libya, and said that during her tenure as secretary of state, the U.S. had a “reckless, rudderless and aimless foreign policy.”

Clinton’s campaign sees foreign policy as an area ripe for a sharp general election contrast with Trump, given her years at the State Department and his lack of experience in international affairs. In a campaign conference call Wednesday, Clinton supporter and former secretary of state Madeline Albright called Trump’s views “incoherent.”

“I’ve never seen such a combo of simplistic slogans and contradictions and misstatements in one speech,” Albright said. “He just underscored the fact that he’s running the most reckless and dangerous campaign in modern history.”

Like Trump, Clinton emerged from this week’s Northeastern primaries with a stronger claim on her party’s nomination. With four victories Tuesday, she now has 90 percent of the delegates needed to clinch the Democratic nomination.

Vermont Sen. Bernie Sanders, campaigning in Indiana as well Wednesday, conceded that the delegate math was not in his favor against Clinton. He said that while his campaign still aims to win the nomination, it will also seek to assemble as many delegates as possible to influence the party’s platform and message.

“Our job whether we win or whether we do not win is to transform not only our country but the Democratic Party, to open the doors of the Democratic Party to working people and young people and senior citizens in a way that does not exist today,” Sanders said.

Cruz hoped that adding Fiorina to his potential ticket would be a draw for Republicans desperate to keep Clinton out of the White House. Fiorina, the former Hewlett-Packard chief executive, was frequently praised for her tough criticism of Clinton during her own presidential campaign.

Fiorina dropped out of the GOP race after the New Hampshire primary and endorsed Cruz. She’s since been his most active surrogate, making frequent campaign appearances alongside him and on her own.

Wednesday’s planned announcement was highly unusual. Candidates typically wait until they’ve secured their party’s nomination before picking a running mate, in part of avoid appearing as though they’re getting ahead of the will of the voters.

But in Cruz’s case, the announcement seemed aimed at keeping up the appearance that he has a claim to the nomination and potentially attracting more voters to his campaign in Indiana and other remaining states — including Fiorina’s home state of California.

Asked earlier on Fox & Friends about Cruz potentially naming a running mate, Trump said, “To me it looks ridiculous, he’s not going to get the nomination.”

Trump emerged with more than 50 percent of the Republican votes in Pennsylvania, Connecticut and Maryland, and scored over 60 percent in Delaware and Rhode Island. Similarly, Clinton won convincingly in four of the five contests, scoring 56 percent in Pennsylvania and 63 percent in Maryland — the two biggest contests of the night. Sanders won the Rhode Island primary with 55 percent of the vote.

(AP)