DES MOINES, Iowa (AP) — Republican presidential candidate Donald Trump spent part of his July 4th with Iowa Sen. Joni Ernst, fueling speculation about his vice presidential pick. Trump met with Ernst in New Jersey on Monday and praised her in a tweet.

Ernst is a first-term senator, combat veteran and the first woman elected to Congress from Iowa. She ran on a platform of cutting wasteful spending, with the slogan “Make ’em squeal.”

Trump also spent time over the weekend with Indiana Gov. Mike Pence. In addition, the New York billionaire is considering former House Speaker Newt Gingrich, New Jersey Gov. Chris Christie, Indiana Gov. Mike Pence and Alabama Sen. Jeff Sessions.

In a statement, Ernst says she had a good conversation with Trump but did not say whether the vice presidency was discussed.