With three weeks until Election Day, Hillary Clinton’s team is stepping up its coordinated campaign efforts, sending an additional $6 million to seven battleground states with competitive Senate races.

The campaign is also expanding its efforts in states where it admits that the Democratic presidential nominee faces an uphill battle, but where down-ballot Democrats could get a boost from increased turnout.

The Clinton campaign now sees the presidential battlefield expanding to Arizona, where it intends to spend an additional $2 million that will also benefit down-ballot Democrats. First lady Michelle Obama will campaign for Clinton in Phoenix on Thursday, the campaign announced Monday.

Republican nominee Donald Trump and his comments about Arizona Sen. John McCain have made the state more competitive, Clinton campaign manager Robby Mook said on a press call Monday morning. Democratic Rep. Ann Kirkpatrick is taking on McCain in the state’s Senate race.

Mook also highlighted the Grand Canyon State’s two competitive House races in the 1st and 2nd District, where Democratic candidates could benefit from Clinton’s increased attention to the state.