Some GOP senators want public commitments from Robert F. Kennedy Jr. before deciding whether to support him as the next secretary of the Department of Health and Human Services, signaling that President Donald Trump’s pick will have to win over uncertain Republicans in order to secure the job.

Sens. Susan Collins and Todd Young, who both serve on the Intelligence Committee, are among the Republicans who have yet to say whether they will support Tulsi Gabbard. Only one Republican would need to oppose her to block her nomination from being reported favorably to the full Senate,

Tulsi Gabbard is on shaky ground with Senate Republicans. This week will determine if the director of national intelligence nominee will be able to find her footing. Ahead of a Senate Intelligence Committee hearing Thursday,

At least three Republican senators on the panel that will decide whether to advance Tulsi Gabbard’s nomination as Director of National Intelligence have not said how they plan to vote, according to Politico—leaving open the possibility she could be the first of President Donald Trump’s nominees to be rejected.