WASHINGTON (AP) – Marco Rubio, Jeb Bush, John Kasich and Chris Christie, the four Republican candidates in a showdown for their party’s traditional supporters, closed last year with roughly as much money in the bank combined as Ted Cruz, the conservative insurgent they hope to topple.

And then there’s Donald Trump, a celebrity businessman who has just begun to flex his billion-dollar bank account, lending his campaign $10.8 million from his personal wealth late last year.

The Republican candidates seeking to challenge Trump and Cruz at the top of the field were in varying degrees of financial distress at the end of 2015, fundraising reports filed Sunday night show, with Rubio in the best position to move forward. Together, as the calendar flipped to 2016, the foursome had $21.6 million left in the bank, while Cruz had almost $18.7 million at his disposal.

With voting beginning Monday in Iowa, and continuing next week in New Hampshire, Rubio, Bush, Kasich and Christie were running low on time – as well as money – in their efforts to rise. Should one or more of them continue on after New Hampshire, they’ll face a cost-intensive primary calendar that demands travel among some two dozen states and advertising in some of the country’s priciest media markets before March 15.

Of the four, Rubio, a Florida senator, led the money chase in the final three months of the year, collecting $14.2 million and ending with $10.4 million in the bank. What’s more, he was on the upswing, having more than doubled his fundraising pace from earlier in the year. In total, he collected $39.5 million in 2015.

That’s more than Bush’s annual total. And the former Florida governor’s fundraising fortunes appear to be moving in the opposite direction as Rubio’s.

He raised just $7.1 million between Oct. 1 and Dec. 31, about what his haul had been in the preceding fundraising quarter. He closed the year with about $7.6 million in the bank. He had detected a cash crisis in the fall and retrenched his national plan to focus almost exclusively on New Hampshire.

Yet in that state, where voters weigh in Feb. 9, there are two others who also have gone all-in: Kasich, the Ohio governor, and Christie, the New Jersey governor.

Those candidates have struggled to gain traction among donors, their fundraising reports show.

Kasich and Christie each raised about $3 million in between Oct. 1 and Dec. 31. Kasich closed out the year with about $2.5 million in cash, and Christie with just over $1 million.

Kasich’s allies were eager to portray his financial prospects as improving. Outside groups supporting his bid said they’ve landed $4 million in checks from six donors in the past few weeks, a period of time not covered by the reports.