Bad operands for binary operator '&&'. Please Help me find out what's wrong

 package whowins;

import java.util.Scanner;
public class WhoWins {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    String candidate[] = {"Trump","Fiorina","Carson","Sanders"};
    String position[] = {"trumpPosition", "fiorinaPosition", "carsonPosition", "sandersPosition"};
    double supportTrump, supportFiorina, supportCarson, supportSanders;

    Scanner cs = new Scanner(System.in);

    System.out.println("What is Trump's support?");
    supportTrump = cs.nextDouble();
    System.out.println("What is Fiorina's Support?");
    supportFiorina = cs.nextDouble();
    System.out.println("What is Carson's support?");
    supportCarson = cs.nextDouble();
    System.out.println("What is Sander's support?");
    supportSanders = cs.nextDouble();

    if ((supportTrump) > (supportFiorina) && (supportCarson) && (supportSanders) {
        position[0] = ("First Place");
    }
}
}

The problem I am having is not being able to compare the Doubles that will be provided by the user.

if ((supportTrump) > (supportFiorina) && (supportCarson) && (supportSanders) { <--------This whole line is an error and I've tried everything.